Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
te sach » toc sach
ty mang » ty hang, tin mang, tri mang
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
cua tu » cua tuc, cua su, cua cu

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: te sach ((ty mang) OR (ty xang)) xa hoi. hieu va cac tuc van thanh vi ((cua te) OR (cua tu))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty mang) OR (ty xang)) xa hoi. hieu va cac tuc van thanh vi ((cua te) or (cua tu))~".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty mang) OR (ty xang)) xa hoi. hieu va cac tuc van thanh vi ((cua te) or (cua tu))*.