Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nam thuc » nam thuoc, am thuc, nam thu
cau treo » cau theo, cau triet, cau trieu
ky lang » ky nang, ky dang, ky tang
sinh ky » sinh ly, sinh y, kinh ky
thuc va » thuc vat, thuc dan, thuc day
hieu ha » hieu hoa, hieu va, hieu ca
lang xa » lang ha, dang xay, lang van
dan vai » dan tai, dan vat, den vai
dan va » doan va, dan ca, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ky lang xa hoi. hieu ha nam thuc va ((dan vai) OR (dan va)) ((cau treo) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ky lang xa hoi. hieu ha nam thuc va ((dan vai) OR (dan va)) ((cau treo) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh ky lang xa hoi. hieu ha nam thuc va ((dan vai) OR (dan va)) ((cau treo) or (cau tren))".
• Adding a wildcard symbol may retrieve word variants: hoc sinh ky lang xa hoi. hieu ha nam thuc va ((dan vai) OR (dan va)) ((cau treo) or (cau tren))*.