Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
van hanh » van thanh, ban hanh, van anh
va triet » va thiet, va trien, ve triet
hoc sach » hoc sinh, hoc cac, hoc anh
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
hanh de » hanh ve, hanh kem
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
de va » de 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) OR (hoc sach)) v nang x hoi. ((hieu va) or (lieu va)) cam duc van hanh de va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) v nang x hoi. ((hieu va) OR (lieu va)) cam duc van hanh de va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) v nang x hoi. ((hieu va) or (lieu va)) cam duc van hanh de va triet*".