Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
ma hoi » mai hoi, xa hoi, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang ((ma hoi) or (ma hoa)). hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((ma hoi) OR (ma hoa)). hieu ve ((cam tuc) OR (nam thuc)) va hanh vai cua viet.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((ma hoi) or (ma hoa)). hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua viet*.