Perhaps you should try some spelling variations:
tinh thong » tinh thuong, trinh thong, tinh khong
quan khuan » quan luan, quan khu, quan khoa
khuan kiem » khuan viem, phan kiem, hoan kiem
hieu soat » hieu suat, hieu hoat, hieu luat
kiem soat » kiem toan
quan van » luan van, quan va, quan luan
van hieu » cao hieu

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