Perhaps you should try some spelling variations:
cau trieu » cac trieu, cau triet, chua trieu
thanh hai » thanh phan, thanh hoa, thanh san
ban thanh » ban hanh, ban hang
hai cau » hai chau, hai chu, hai hau
duc ban » duc tan, duc van, dua ban
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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 (su sach)) y nang ma hoi. ((hieu va) or (lieu va)) pham duc ban thanh hai cau trieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) y nang ma hoi. ((hieu va) OR (lieu va)) pham duc ban thanh hai cau trieu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) y nang ma hoi. ((hieu va) or (lieu va)) pham duc ban thanh hai cau trieu*.