Perhaps you should try some spelling variations:
doan vang » doan van, doan quang, doan trang
cham luc » cham soc, cham cuu, chat lua
nhan luc » nang luc
vang cua » mang cua, hang cua, tang cua
van doan » van doanh, van toan, van hoan
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ly nang » ly hang, ly vang, ly quang
cua tre » cua te, cuu tre, cua triet

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 ((ly nang) OR (ky nang)) xa hoi. hieu ve ((cham luc) OR (nhan luc)) van doan vang cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ly nang) OR (ky nang)) xa hoi. hieu ve ((cham luc) or (nhan luc)) van doan vang cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly nang) OR (ky nang)) xa hoi. hieu ve ((cham luc) or (nhan luc)) van doan vang cua tre*.