Perhaps you should try some spelling variations:
dung quang » dang quang, dung quan, luong quang
quang tuan » quang thanh, quan luan, quang cua
dieu soat » hieu suat, dieu hoa, dieu hat
kiem soat » kiem toan
quang va » quang van, quan va, quang ma
tuan vi » quan vi, luan vi, quans vi
vi dieu » va dieu
bien so » bien doi
tinh » dinh, minh, kinh

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 tuan vi dieu soat ) or ( trinh dung quang va ((kiem soat) or (bien so)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang tuan vi dieu soat ) OR ( trinh dung quang va ((kiem soat) OR (bien so)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh quang tuan vi dieu soat ) or ( trinh dung quang va ((kiem soat) or (bien so)) ))*.