Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
cac tac » cac toc, cac bac, cac dac
van cac » van hac, van cau, van bac
nang xa » nang x, lang xa, nang ma
da nang » cam nang, kha nang, cao nang
so sanh » do sanh
tac va » tac da, tac xa, tuc va
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)) da nang xa hoi. hieu van cac tac va thanh vai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) da nang xa hoi. hieu van cac tac va thanh vai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) da nang xa hoi. hieu van cac tac va thanh vai ((cua tre) OR (cua te))*.