Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
dinh luong » dinh duong, dinh huong, dinh cuong
luong luan » luong quan, luong xuan, cuong luan
hieu soat » hieu suat, hieu hoat, hieu luat
van hieu » cao hieu
hoan kim » hoang kim, hoan kiem, toan kiem
kim soat » kiem soat, kim loai, kim hoa

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 luan van hieu soat ) or ( dinh luong luan hoan kim soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh quan luan van hieu soat ) OR ( dinh luong luan hoan kim soat )).
• Adding a wildcard symbol may retrieve word variants: (( trinh quan luan van hieu soat ) or ( dinh luong luan hoan kim soat ))*.