Perhaps you should try some spelling variations:
quang quang » quan quang, dang quang, dung quang
quang cao » nang cao, quang nam
hieu soat » hieu suat, hieu hoat, kiem soat
hieu luat » hieu qua
dung tan » dung toan, duong tan, dung tai
tan van » tran van, tang van, luan van
ky toan » ke toan, ly toan, huy toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung tan van ky toan ) or ( tinh quang quang cao ((hieu soat) or (hieu luat)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung tan van ky toan ) OR ( tinh quang quang cao ((hieu soat) OR (hieu luat)) )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung tan van ky toan ) or ( tinh quang quang cao ((hieu soat) or (hieu luat)) ))*.