Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
cua viet » ca viet, hoa viet, cua vat
ban hanh » ban hang
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » hieu qua
nang ma » tang ma, sang ma, nang cao
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 thue nang ma hoi. ((hieu va) or (lieu va)) cac xuc ((va hanh) or (ban hanh)) vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thue nang ma hoi. ((hieu va) OR (lieu va)) cac xuc ((va hanh) OR (ban hanh)) vai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach thue nang ma hoi. ((hieu va) or (lieu va)) cac xuc ((va hanh) or (ban hanh)) vai cua viet*.