Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
cam tu » cam thu, nam tu, dam tu
vai va » mai va, dai va, hai va

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 y nang cao hoi. lieu va ((((cam tu) or (nam thuc))) or (cam xuc)) va hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. lieu va ((((cam tu) OR (nam thuc))) OR (cam xuc)) va hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoi. lieu va ((((cam tu) or (nam thuc))) or (cam xuc)) va hanh vai va triet*.