Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
hanh ve » hanh vi, hanh va, hanh kem
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
ve va » ve van, te va, ke va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach v nang x hoi. ((hieu va) or (lieu va)) cam duc van hanh ve va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach v nang x hoi. ((hieu va) OR (lieu va)) cam duc van hanh ve va triet.
• Adding a wildcard symbol may retrieve word variants: thuoc sach v nang x hoi. ((hieu va) or (lieu va)) cam duc van hanh ve va triet*.