Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
sach v » sach va, sach 2, sach vay
luc va » duc va, tuc va, loc va
dao vi » dao voi, dao va, dao li
dao ve » bao ve, dap ve, dau ve
cua te » cua tu

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: te ((sach v) OR (sach y)) lang xa hoi. hieu vu cham luc va ((dao vi) OR (dao ve)) cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach y)) lang xa hoi. hieu vu cham luc va ((dao vi) OR (dao ve)) cua te~".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach y)) lang xa hoi. hieu vu cham luc va ((dao vi) OR (dao ve)) cua te*.