Perhaps you should try some spelling variations:
nuoc giao » nuoc giai, quoc gia, hoc giao
thuc van » thuc vat, thuc dan, thuc va
cau thuc » cau truc, cuu thuc, can thuc
giao ky » giao ly, giang ky
hang vi » hanh vi, hang di, khang voi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc giao ky ((nang xa) or (lang xa)) hoi. hieu ve cau thuc van ((hang vi) OR (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc giao ky ((nang xa) OR (lang xa)) hoi. hieu ve cau thuc van ((hang vi) OR (hang va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc giao ky ((nang xa) or (lang xa)) hoi. hieu ve cau thuc van ((hang vi) OR (hang va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc giao ky ((nang xa) or (lang xa)) hoi. hieu ve cau thuc van ((hang vi) OR (hang va)) cua tre*.