Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc gia » thuc giai, thue gia, thuc dia
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (tu san)) ky nang xa hoi. hieu van nam thuc gia thanh doi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (tu san)) ky nang xa hoi. hieu van nam thuc gia thanh doi ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (tu san)) ky nang xa hoi. hieu van nam thuc gia thanh doi ((cua tre) or (su triet))*.