Perhaps you should try some spelling variations:
dam thuc » am thuc, dan thuc, nam thuc
tinh dai » trinh dai, tinh da, tinh hai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
tu san » thu san, tu can, vu san
tu ban » thu ban, te ban
cam tu » cam thu, nam tu, dam tu
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) or (tu ban)) ky nang xa hoi. hieu ve ((dam thuc) or (cam tu)) may tinh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ky nang xa hoi. hieu ve ((dam thuc) OR (cam tu)) may tinh dai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu ban)) ky nang xa hoi. hieu ve ((dam thuc) or (cam tu)) may tinh dai cua te*.