Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nang cau » nang cao, hang cau, nang dau
hieu van » hieu va, thien van, hieu ve
cam thuc » am thuc, nam thuc, cam thu
thuc van » thuc vat, thuc dan, thuc va
thanh vi » hanh vi, thanh va, thanh ve
cau treo » cau theo, cau tren, cau triet
cuu tre » cua tre, cau tren
te sai » te tai, te bai, te lai
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky nang cau hoi. ((hieu van) or (lieu va)) cam thuc van thanh vi ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang cau hoi. ((hieu van) OR (lieu va)) cam thuc van thanh vi ((cuu tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: te sai ky nang cau hoi. ((hieu van) or (lieu va)) cam thuc van thanh vi ((cuu tre) or (cau treo))*.