Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, hoc dan, thuc vat
thuc ban » thuoc ban, thu ban, thuc van
thanh vi » hanh vi, thanh va, thanh ve
va triet » va thiet, va trien, ve triet
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang ky
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
tuc dan » thuc day, tung dan, tuc tang
vi va » vi van, vai va, vu va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: so sang ky nang xa hoi. hieu van cau ((((tuc dan) OR (thuc dan))) OR (thuc ban)) thanh vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sang ky nang xa hoi. hieu van cau ((((tuc dan) OR (thuc dan))) or (thuc ban)) thanh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: so sang ky nang xa hoi. hieu van cau ((((tuc dan) OR (thuc dan))) or (thuc ban)) thanh vi va triet*.