Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van doan » van doanh, van toan, van hoan
tu sach » thu sach, su sach, te sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc van » luoc van, luu van, duc van
van cua » vang cua, dan cua, nan cua
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y ((nang xa) or (lang xa)) hoi. hieu ve cham luc van doan ((van cua) OR (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu ve cham luc van doan ((van cua) OR (ban cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (lang xa)) hoi. hieu ve cham luc van doan ((van cua) OR (ban cua)) tre*".