Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
vai cua » dai cua, hai cua, lai cua
tu sach » thu sach, su sach, te sach
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
luu va » luu van, lau va, huu va
cuu va » cuu van, cuu ve

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: tu sach v ((nang ma) OR (tang ma)) hoi. hieu van thanh ((luu va) OR (cuu va)) hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v ((nang ma) or (tang ma)) hoi. hieu van thanh ((luu va) OR (cuu va)) hanh vai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach v ((nang ma) or (tang ma)) hoi. hieu van thanh ((luu va) OR (cuu va)) hanh vai cua tre*.