Perhaps you should try some spelling variations:
tinh luong » tinh huong, dinh luong, minh luong
luong quan » thong quan, duong qua
dung quan » dung quang, dung luan, dang quang
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
quan van » luan van, quan va, quan luan
van hieu » cao hieu
quan can » quan cau, xuan can, quang chan
can kiem » van kiem, can kim, toan kiem

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 quan van hieu soat ) or ( tinh luong quan can kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung quan van hieu soat ) OR ( tinh luong quan can kiem soat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung quan van hieu soat ) or ( tinh luong quan can kiem soat ))*.