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