Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam tu, dam thuc, nam truc
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
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 ((((cam tuc) OR (nam thuc))) OR (cam xuc)) va hanh vai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu va ((((cam tuc) OR (nam thuc))) OR (cam xuc)) va hanh vai va triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu va ((((cam tuc) OR (nam thuc))) OR (cam xuc)) va hanh vai va triet*.