Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
phan luc » nhan luc, phan duc, phan suc
thanh te » thanh ve, thanh de, thanh le
su sach » so sach, vu sach
te sach » toc sach
hieu va » lieu va, hieu qua
va phan » van phan, va phat, va phap
luc van » luoc van, luu van, duc van
te cua » tue cua, le cua, de cua
x hoi » xa hoi, o hoi, x ho

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 (te sach)) ky nang x hoi. hieu va phan luc van thanh te cua vat~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang x hoi. hieu va phan luc van thanh te cua vat*.