Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
quan quang » qua quang, quan quan, quat quang
khong luan » khong quan, khung luan, phong luan
thong luan » thong quan, tong luan, thong xuan
quang van » quang ban, quan van, quang uan
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
van hieu » cao hieu
va kiem » van kien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh quan quang van hieu soat ) or ( tinh ((khong luan) or (thong luan)) va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh quan quang van hieu soat ) OR ( tinh ((khong luan) OR (thong luan)) va kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh quan quang van hieu soat ) or ( tinh ((khong luan) or (thong luan)) va kiem soat ))*.