Perhaps you should try some spelling variations:
quang tan » quang tuan, quang tran, quang toan
kiem soat » kiem toan
danh phan » doanh phan, danh nhan, danh phap
hieu suat » hieu luat, hieu qua
van kiem » va kiem, van kien, van hieu
lan hieu » luan hieu, van hieu, lan dieu
tan van » tran van, tang van, luan van
phan le » pham le, phan mem, phan lap
le lan » le lang, le luan, le dan
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh quang tan van kiem soat ) or ( danh phan le lan hieu suat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang tan van kiem soat ) OR ( danh phan le lan hieu suat ))*.