Perhaps you should try some spelling variations:
hanh dieu » han dieu, hinh dieu, hoang dieu
thien van » thi van
dieu cua » dieu tra
thuc van » thuc vat, thuc dan, thuc hanh
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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 sac ky nang xa hoi. ((hieu ve) OR (thien van)) cau ((thuc van) OR (thuc va)) hanh dieu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. ((hieu ve) or (thien van)) cau ((thuc van) OR (thuc va)) hanh dieu cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. ((hieu ve) or (thien van)) cau ((thuc van) OR (thuc va)) hanh dieu cua tre*.