Perhaps you should try some spelling variations:
cau theo » cau tao
te cach » ve cach, te sach, tu cach
dao vai » dao van, dao va, dao bai
cac tuc » cac toc, cac tu, cac tac
cach tu » cach thuc
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cac » va cac, vien cac
tuc ca » tuc cac, tuc cua, tuc xa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te cach tu ((nang xa) OR (nang x)) hoi. hieu ve cac tuc ca dao vai ((cau theo) OR (cau thi))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cach tu ((nang xa) or (nang x)) hoi. hieu ve cac tuc ca dao vai ((cau theo) OR (cau thi))~".
• Adding a wildcard symbol may retrieve word variants: te cach tu ((nang xa) or (nang x)) hoi. hieu ve cac tuc ca dao vai ((cau theo) OR (cau thi))*.