Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, va danh
lam xuc » cam xuc, lam duoc
van lam » van nam
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (thuat sach)) ky nang ma hoi. hieu van lam xuc ((ban hanh) or (va hanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (thuat sach)) ky nang ma hoi. hieu van lam xuc ((ban hanh) OR (va hanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (thuat sach)) ky nang ma hoi. hieu van lam xuc ((ban hanh) or (va hanh)) di cua tre*.