Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
han lai » han tai, han li, phan loai
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, nang ma
tu san » thu san, tu ban, tu can
te san » te ban, ke san, ta san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te san) OR (tu san)) ky nang xa hoi. hieu van cam ((truc va) or (thuc va)) han lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te san) OR (tu san)) ky nang xa hoi. hieu van cam ((truc va) OR (thuc va)) han lai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te san) OR (tu san)) ky nang xa hoi. hieu van cam ((truc va) or (thuc va)) han lai su triet".
• Adding a wildcard symbol may retrieve word variants: ((te san) OR (tu san)) ky nang xa hoi. hieu van cam ((truc va) or (thuc va)) han lai su triet*.