Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
vu sach » vu bach, vu khach
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
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 (vu sach))) or (so sach)) y nang ma hoi. hieu va cam tuc va hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sach) OR (vu sach))) OR (so sach)) y nang ma hoi. hieu va cam tuc va hanh vai va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((su sach) OR (vu sach))) or (so sach)) y nang ma hoi. hieu va cam tuc va hanh vai va triet".
• Adding a wildcard symbol may retrieve word variants: ((((su sach) OR (vu sach))) or (so sach)) y nang ma hoi. hieu va cam tuc va hanh vai va triet*.