Perhaps you should try some spelling variations:
quang cao » nang cao, quang nam
kiem soat » kiem toan
hien soat » thien hoat, hien luat, dien hoat
bien soan » bien so
va kiem » van kien
cao va » cao van, tao va, co va
tinh » trinh, dinh, kinh
luan » quan, lan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( (tinh or minh) quang cao va kiem soat ) or ( tin dung luan van ((hien soat) OR (bien soan)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( (tinh OR minh) quang cao va kiem soat ) OR ( tin dung luan van ((hien soat) OR (bien soan)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( (tinh or minh) quang cao va kiem soat ) or ( tin dung luan van ((hien soat) OR (bien soan)) ))".
• Adding a wildcard symbol may retrieve word variants: (( (tinh or minh) quang cao va kiem soat ) or ( tin dung luan van ((hien soat) OR (bien soan)) ))*.