Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
cua tre » cua te, cuu tre, dua tren
tu cao » cu cao, tu cac, vu cao
ma hoi » mai hoi, xa hoi, ma hoa
thu va » thuc va, thue va, tu va

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: tu cao ky nang ma hoi. ((hieu ve) OR (hieu van)) nam thu va thanh vi ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cao ky nang ma hoi. ((hieu ve) or (hieu van)) nam thu va thanh vi ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu cao ky nang ma hoi. ((hieu ve) or (hieu van)) nam thu va thanh vi ((cua tre) OR (cua triet))*.