Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
di cau » da cau, diem 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 sach) or (so sanh)) ky lang xa hoi. ((hieu ve) OR (hieu van)) cam thuc va hang di cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (so sanh)) ky lang xa hoi. ((hieu ve) OR (hieu van)) cam thuc va hang di cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (so sanh)) ky lang xa hoi. ((hieu ve) OR (hieu van)) cam thuc va hang di cau treo".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sanh)) ky lang xa hoi. ((hieu ve) OR (hieu van)) cam thuc va hang di cau treo*.