Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hieu suat » hieu luat, hieu qua
kiem soat » kiem toan
dung lan » dung luan, dung land, dung lam
van hieu » cao hieu
quan van » luan van, quan va, quan luan
van kiem » va kiem, van kien, van hien
lan van » luan van, lang van, tan van
van van » van ban, tan van, san van
tin » tinh

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 lan van hieu suat ) or ( trinh quan van van kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung lan van hieu suat ) OR ( trinh quan van van kiem soat ))*.