Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
nang mai » nang ma, nang tai, lang mai
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh va, hanh tai
va triet » va thiet, va trien, ve triet
mai hoi » mai khoi, dai hoi, lai hoi
cam tuc » cam tu, dam thuc, nam truc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
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: hoc sach y nang mai hoi. lieu va ((((cam tuc) or (nam thuc))) or (cam xuc)) va hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang mai hoi. lieu va ((((cam tuc) OR (nam thuc))) OR (cam xuc)) va hanh vai va triet.
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang mai hoi. lieu va ((((cam tuc) or (nam thuc))) or (cam xuc)) va hanh vai va triet*.