Perhaps you should try some spelling variations:
lieu van » hieu van, sieu van, lieu nano
cam thuc » am thuc, nam thuc, cam thu
nang xa » nang x, lang xa, nang ma
vat han » vat phan, van han, vat ran
han lai » han tai, han li, phan loai
su viet » so viet
te van » le van, te va, ve van

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

• Performing a fuzzy search may retrieve terms with similar spellings: te van ky nang xa hoi. ((lieu van) or (lieu va)) cam thuc vat han lai su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te van ky nang xa hoi. ((lieu van) OR (lieu va)) cam thuc vat han lai su viet.
• Adding a wildcard symbol may retrieve word variants: te van ky nang xa hoi. ((lieu van) or (lieu va)) cam thuc vat han lai su viet*.