Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
hanh vai » hanh vi, hanh va, hanh tai
cam tuc » cam tu, nam thuc, dam thuc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
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 ma hoi. ((hieu va) OR (hieu qua)) ((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 y nang ma hoi. ((hieu va) OR (hieu qua)) ((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 y nang ma hoi. ((hieu va) OR (hieu qua)) ((cam tuc) or (cam xuc)) va hanh vai va trien*".