Perhaps you should try some spelling variations:
quang hoang » quan hoang, tuan hoang, xuan hoang
quang lang » quan lang, quang dang, quang khang
chien soat » thien hoat
hieu soat » hieu suat, hieu hoat, hieu luat
van chien » van hien, van tien
van hieu » cao hieu
tinh » trinh, dinh, minh
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 ((quang lang) OR (quang hoang)) van hieu soat ) or ( tin dung luan van chien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((quang lang) OR (quang hoang)) van hieu soat ) OR ( tin dung luan van chien soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh ((quang lang) OR (quang hoang)) van hieu soat ) or ( tin dung luan van chien soat ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh ((quang lang) OR (quang hoang)) van hieu soat ) or ( tin dung luan van chien soat ))*.