Perhaps you should try some spelling variations:
thien van » thi van
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » hieu va, lieu va, hieu ve
nam duoc » nam thuoc, da duoc, dat duoc
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
hang xa » hoang xa, hang va, hang ca
cao duc » dao duc, cao suc, giao duc
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly hang xa hoi. ((hieu van) or (thien van)) ((nam duoc) or (cao duc)) van thanh tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly hang xa hoi. ((hieu van) OR (thien van)) ((nam duoc) OR (cao duc)) van thanh tai cuc te.
• Adding a wildcard symbol may retrieve word variants: tu sach ly hang xa hoi. ((hieu van) or (thien van)) ((nam duoc) or (cao duc)) van thanh tai cuc te*.