Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
tu cach » tu cac
cua tre » cua te, cua triet, dua tren
han tai » hang tai, nhan tai, van tai
cao duc » dao duc, cao suc, giao duc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
cuu tre » cau tren, cau treo
ve cao » va cao, ve bao, ve cac
va han » va phan, van han, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thuc ((nang xa) or (tang ma)) hoi. hieu ve cao duc va han tai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thuc ((nang xa) OR (tang ma)) hoi. hieu ve cao duc va han tai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach thuc ((nang xa) or (tang ma)) hoi. hieu ve cao duc va han tai ((cua tre) OR (cuu tre))*".