Perhaps you should try some spelling variations:
nang quang » nang quan, dang quang, hang quang
trinh dang » trinh dung, trinh dan, trinh bang
dang cong » dung cong
hieu suat » hieu qua
hieu luat » hieu qua
tich nang » tich van, tin nang
ninh kiem » sinh kiem, trinh kiem, binh khiem
kiem soat » kiem toan
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dang cong van ((hieu suat) or (hieu luat)) ) or ( tich nang quang ninh kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dang cong van ((hieu suat) OR (hieu luat)) ) OR ( tich nang quang ninh kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dang cong van ((hieu suat) or (hieu luat)) ) or ( tich nang quang ninh kiem soat ))*.