Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su triet » su tien, ve triet
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
truc va » thuc va, thuc vat, trung va
han lai » han tai, han li, phan loai
su viet » so viet
te san » te ban, tu san, ta san
ke san » ke dan
va han » va phan, van han, va hanh

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

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