Perhaps you should try some spelling variations:
cham luc » cham soc, cham cuu, chat lua
doan ban » doanh ban, toan ban, doan van
van doan » van doanh, van toan, van hoan
nhan luc » nang luc
sach lo » sach dao, sach doi, sach hoi
ban cua » ban quan
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
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 lo ((nang x) OR (lang xa)) hoi. hieu ve ((cham luc) OR (nhan luc)) van doan ban cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach lo ((nang x) or (lang xa)) hoi. hieu ve ((cham luc) OR (nhan luc)) van doan ban cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach lo ((nang x) or (lang xa)) hoi. hieu ve ((cham luc) OR (nhan luc)) van doan ban cua tre*.