Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
da nang » cam nang, kha nang, cao nang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac dac
cua tre » cuu tre, cua triet, dua tren
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 (do sanh)) da nang xa hoi. hieu va 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 (do sanh)) da nang xa hoi. hieu va cac tac va thanh vai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (do sanh)) da nang xa hoi. hieu va cac tac va thanh vai ((cua tre) OR (cua te))*.