Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
va nang » van nang, da nang, cam nang
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
cac tu » cac thu, cach tu, cac du
vi cua » vai cua, di cua

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 sach) OR (so sanh)) va nang xa hoi. ((hieu van) OR (thien van)) cac tu va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) va nang xa hoi. ((hieu van) OR (thien van)) cac tu va thanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) va nang xa hoi. ((hieu van) OR (thien van)) cac tu va thanh vi cua tre*.