Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh vai » hanh vi, hanh va, hanh tai
va hanh » van hanh, va thanh, va danh
cam tuc » cam tu, nam thuc, dam thuc
su sach » vu sach
nang ma » tang ma, sang ma, nang cao
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
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: ((su sach) OR (so sach)) y nang ma hoi. lieu va ((cam tuc) or (cam xuc)) va hanh vai va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang ma hoi. lieu va ((cam tuc) OR (cam xuc)) va hanh vai va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) y nang ma hoi. lieu va ((cam tuc) or (cam xuc)) va hanh vai va trien*".