Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
tu cach » tu cac
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
tang ma » mang may, tang van
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien 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) OR (ve cac)) duc va han tai cua 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) OR (ve cac)) duc va han tai cua 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) OR (ve cac)) duc va han tai cua tre*".