Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
hieu van » hieu va, thien van
cam thuc » am thuc, nam thuc, cam thu
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, cua triet
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua, di cua

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 can ky nang ma hoi. ((hieu ve) OR (((hieu van) OR (lieu va)))) cam thuc vat thanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ma hoi. ((hieu ve) or (((hieu van) or (lieu va)))) cam thuc vat thanh vi cua tre*.