Perhaps you should try some spelling variations:
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
van hanh » van thanh, ban hanh, van anh
cau treo » cau theo, cau tren, cau triet
te san » te ban, ke san, tu san
san ky » sang ky, van ky, dan ky
vi cau » va cau, ve cau, di cau

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

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