Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
cam truc » cau truc, nam truc, lam truoc
va nang » van nang, da nang, cam nang
dai moi » doi moi, dai hoi
qua cam » qua cham, qua cac, qua ca
bo sach » co sach, hoc sach
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
so sach » so sanh, co sach, hoc sach
v nang » vu nang, van nang, voi nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (bo sach)) ((v nang) OR (va nang)) dai moi. hieu qua cam truc va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (bo sach)) ((v nang) OR (va nang)) dai moi. hieu qua cam truc va hanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (bo sach)) ((v nang) OR (va nang)) dai moi. hieu qua cam truc va hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (bo sach)) ((v nang) OR (va nang)) dai moi. hieu qua cam truc va hanh vai cua viet*.