Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
hieu van » thien van, lieu va, hieu ve
cac truc » cau truc, cac tru, cac trung
hanh tai » hang tai, han tai, hinh tai
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky

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: su sac ky nang xa hoi. ((hieu van) OR (hieu va)) cac truc va ((hanh tai) OR (thanh tai)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((hieu van) or (hieu va)) cac truc va ((hanh tai) OR (thanh tai)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. ((hieu van) or (hieu va)) cac truc va ((hanh tai) OR (thanh tai)) cua tre*.