Perhaps you should try some spelling variations:
vai trien » va trien, cai thien, cai tien
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, dam thuc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
va vai » va bai, va van, va dai
x hoi » xa hoi, o hoi, x ho

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