Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
va nang » van nang, da nang, cam nang
so sanh » do sanh
tac va » tac da, tuc va, tac ha
tac xa » tuc xa, tac da
vi cua » vai cua, di cua
cua te » cua tu

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