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

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 ((cam tuc) or (cam xuc)) va hanh vai ((va trien) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu va ((cam tuc) OR (cam xuc)) va hanh vai ((va trien) OR (va thiet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu va ((cam tuc) or (cam xuc)) va hanh vai ((va trien) OR (va thiet))*".