Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
cuc tieu » muc tieu, cac tieu, cach tieu
cao duc » dao duc, cao suc, giao duc
tu sach » thu sach, su sach, tu cach
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
te sach » toc sach
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa

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) or (te sach)) ly nang ma hoi. hieu ve ((pham duc) or (cao duc)) van thanh tai cuc tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ly nang ma hoi. hieu ve ((pham duc) OR (cao duc)) van thanh tai cuc tieu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ly nang ma hoi. hieu ve ((pham duc) or (cao duc)) van thanh tai cuc tieu*.