Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
sach vay » sach va, sach hay, sach nay
vai cua » dai cua, hai cua, lai cua
luc van » luoc van, luu van, duc van
nam luc » nang luc, nhan luc, nam thuc
cua tre » cua te, cuu tre, cua triet
cao hoc » co hoc, cho hoc, chat hoc
tay hoi » tay ho, tao hoi, tay thai
sach 2 » sach y

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach vay) or (sach 2)) nang ((tay hoi) or (cao hoc)). hieu van nam luc van thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach vay) OR (sach 2)) nang ((tay hoi) OR (cao hoc)). hieu van nam luc van thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach vay) or (sach 2)) nang ((tay hoi) or (cao hoc)). hieu van nam luc van thanh vai cua tre*.