Perhaps you should try some spelling variations:
khong quang » thong quang, hong quang, khong quan
quang thanh » quan thanh, hoang thanh, muong thanh
tinh khong » tinh khang, tinh huong, benh khong
thanh bien » thanh vien, thanh nien, thanh hien
tinh quan » tinh quang, trinh quan, tin quan
kiem soat » kiem toan
bien soan » bien so
lan van » lang van, tan van, san van

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 ((lan van) OR (luan van)) kiem soat ) or ( tinh khong quang thanh bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quan ((lan van) OR (luan van)) kiem soat ) OR ( tinh khong quang thanh bien soan )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh quan ((lan van) OR (luan van)) kiem soat ) or ( tinh khong quang thanh bien soan ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh quan ((lan van) OR (luan van)) kiem soat ) or ( tinh khong quang thanh bien soan ))*.