Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
nam thuc » nam thuoc, am thuc, nam thu
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, dam thuc
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ma hoi » xa hoi, ma hoa, 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 ky nang ((ma hoi) OR (mai hoi)). hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((ma hoi) OR (mai hoi)). hieu ve ((cam tuc) OR (nam thuc)) va hanh vai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) OR (mai hoi)). hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua vat".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) OR (mai hoi)). hieu ve ((cam tuc) or (nam thuc)) va hanh vai cua vat*.