Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
dinh quang » tinh quang, minh quang, dinh duong
quang luan » quang tuan, quang uan, quang xuan
hieu soat » hieu suat, hieu hoat, hieu luat
kien soat » bien soan, kien hoa, dien hoat
kiem soat » kiem toan
van hieu » cao hieu
luan va » luat va

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