Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
luan cong » luong cong, luan chung, luan luong
luat cong » thuat cong, luat chung, cua cong
anh tang » anh bang, anh dang, anh nang
cong hat » cong nhat, cong chat, cong ha
hat nhan » ca nhan, tao nhan, van nhan
nhan luc » nang luc

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: ((doi chieu) OR (theo tieu)) xanh - anh tang ((luan cong) OR (luat cong)) cong hat nhan luc~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo tieu)) xanh - anh tang ((luan cong) OR (luat cong)) cong hat nhan luc~".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo tieu)) xanh - anh tang ((luan cong) OR (luat cong)) cong hat nhan luc*.