Perhaps you should try some spelling variations:
thanh luc » thanh luu, than luc, nhan luc
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
van hanh » ban hanh, van anh, van ban
vai cua » dai cua, hai cua, lai cua
luc van » luoc van, luu van, duc van
nang ma » tang ma, sang ma, nang cao
sach va » sach xa, sach ha, sach dao
cua tre » cua te, cuu tre, cua triet
sach v » sach y, sach 2, sach vay
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach v) or (sach va)) nang ma hoi. hieu van thanh luc van hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach va)) nang ma hoi. hieu van thanh luc van hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) or (sach va)) nang ma hoi. hieu van thanh luc van hanh vai cua tre*.