Perhaps you should try some spelling variations:
dung quang » dang quang, dung quan, luong quang
tinh quan » tinh quang, trinh quan, sinh quan
kiem soat » kiem toan
quang van » quang ban, quan van, quang uan
hieu soan » hieu toan, hieu suat, hieu van
tin quan » tinh quang, trinh quan, lien quan
van kiem » va kiem, van kien, van hien
van hieu » cao hieu
luan » 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 quan) OR (tin quan)) luan van kiem soat ) or ( tin dung quang van hieu soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((tinh quan) OR (tin quan)) luan van kiem soat ) OR ( tin dung quang van hieu soan ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((tinh quan) OR (tin quan)) luan van kiem soat ) or ( tin dung quang van hieu soan ))*".