Perhaps you should try some spelling variations:
cham luc » nhan luc, cham cuu, chat lua
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach 2, sach vay
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
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)) nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va dan vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach y)) nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va dan vi cua te~".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach y)) nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va dan vi cua te*.