Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
da thanh » dao thanh, dat thanh, dam thanh
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
so sanh » do sanh
va nang » van nang, da nang, cam nang
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac dac
cua tre » cua te, cuu tre, dua tren
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) va nang x hoi. hieu va cac tac da thanh vi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) va nang x hoi. hieu va cac tac da thanh vi ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) va nang x hoi. hieu va cac tac da thanh vi ((cua tre) OR (cua triet))*.