Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
quang trach » quang thanh, quang tran
trach bien » tranh bien, cach bien, trinh bien
tin luong » tien luong, tin huong, tin tuong
bien soan » bien so
tinh nang » trinh nang, tin nang, tich nang
nang quan » ban quan, nang suat
hieu suat » hieu luat, hieu qua
quan van » luan van, quan va, quan luan
van hieu » cao hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin luong quang trach bien soan ) or ( tinh nang quan van hieu suat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin luong quang trach bien soan ) OR ( tinh nang quan van hieu suat ))*.