Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
va trien » va truyen, va thiet, va tuyen
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach y, sach tu, sach thu
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, dam thuc
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
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 ty nang cao hoi. lieu va ((((cam tuc) or (nam thuoc))) or (cam xuc)) va hanh vai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang cao hoi. lieu va ((((cam tuc) OR (nam thuoc))) OR (cam xuc)) va hanh vai va trien.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang cao hoi. lieu va ((((cam tuc) or (nam thuoc))) or (cam xuc)) va hanh vai va trien*.