Perhaps you should try some spelling variations:
huong quan » luong quan, cuong quan, vuong quan
tinh huong » dinh huong, tinh quang, anh huong
tich nang » tich van, tin nang
hieu suat » hieu luat, hieu qua
kiem soat » kiem toan
nang sat » nang suat, nang phat, nang sang
van hieu » cao hieu
sat van » sat va, hat van, hoat van
quan su » quan cua
su kiem » su kien, vu kiem, sat kiem

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tich nang sat van hieu suat ) or ( tinh huong quan su kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tich nang sat van hieu suat ) OR ( tinh huong quan su kiem soat ))*.