Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
cam thuc » am thuc, nam thuc, cam thu
hang doi » hang loi, huong doi, hang tai
hang di » hang vi, hang dien, hang dich
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
ve cam » ve cham, ve cac, va cam

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 cam thuc va ((hang di) OR (hang doi)) 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 cam thuc va ((hang di) OR (hang doi)) 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 cam thuc va ((hang di) OR (hang doi)) cau treo".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sanh)) ky lang xa hoi. hieu ve cam thuc va ((hang di) OR (hang doi)) cau treo*.