Very interesting. As far as I know, there is no such slogan that achieved the level of popularity to the point that people would actively chant on street protest, probably because we don't have strong history of organizing protest to push for social changes due to state's strict censroship of political subversion in mainstream media and lack of organizing experience from agitators. I could only think of catchphrases like "Save Tam Đảo"- symbolising the recent movement focusing on opposing selling indigenous forests and lands to corporation to build resorts and golf fields, and "Tôi đồng ý" (I agree) which is the campaign to gather support for the legalization of gay marriages. However, those movements doesn't have popular support and only popular to middle class young people in urban areas. Their impacts are limited on social media space and rarely are people angry enough to bring those issues to the street.
Meanwhile, the most oppressed of people do not have the political power nor resorces like access to progressive Internet space. Their agitation often doesn't have a common catchphrase (as far as I know) other than direct concern about the material conditions in which they are subjected to, like about wages, insurance, legal representatives, justic from scams from banks,... Often time, people who have the power to amplify the struggle of poor people (i.e progressive middle class younglings) do not care and often treat their attempts to destablize the status quo (strikes, protests, smashing factories) as reactionary or due to the influence of American spies. The consequence of this lack of solidarity is that although opressed people movements are most effective to achieve the material goal (states reconsidering compensation for dispossed lands, concession of capitalists to raise wages or add benefits,...), they are often fragmented and do not pose serious challenges to the status quo, while more privileged people are tend to be more moderate in their movement but they have much greater reach and attract far more attention. Both can not do much in the current state. I'm also guilty of this, I'm still not brave enough to address the concern of the opressed enough for fear of, you know, being jailed.
However, I do believe that considering the world and Vietnam is heading to shit, more and more middle class people would regconize our common struggles and effectively fight back the system.
Side note: My knowledge is limited to only modern time, I'm not very aware of how Vietnameses in the colonial time would organize and what slogans they raised. I think that Vietnamese grassroots social movements during that era, albeit heavily limited under to French colonial rule, were much more lively, but more research would be needed :")
Yeah, there have been a lot of cases in which the condominiums, especially ones designed for poor folks, catched on fire. They are not sleep boxes by any means, but the fire hazard inherent in cheap housing is not to be underestimated. Lots of people have died because of the lack of infrastructure that could help tenants escape the fire, so I simply could not imgine how such infrasstructure could exist in these places, nor how landlords who build these would ever have the intention of installing one in the first place. It's bewildering to see the sheer length that landlords would be willing to take to avoid having to follow through fire safety regulations just to save a little money for themselves.
And by the way, while these people have to crawl into rat's hut every night, there are still a lot of abandoned apartments that no one lives in,. Capitalism is so fine.
And yeah, paying rent to live in Vans might be the one of the most dystopian shits I've ever heard of,