Perhaps you should try some spelling variations:
chien toan » thien toan, chien tranh, chien thang
binh duong » dinh duong
dung dang » dung dan, dung dong, dung dung
dung danh » dung doanh, dung dan, cuong danh
hieu soat » hieu suat, hieu hoat, hieu luat
san chien » van chien, can chien, tran chien
van hieu » cao hieu
qua san » qua ban, cua san, qua 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 ((dung dang) OR (dung danh)) van hieu soat ) or ( binh duong qua san chien toan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((dung dang) OR (dung danh)) van hieu soat ) OR ( binh duong qua san chien toan )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh ((dung dang) OR (dung danh)) van hieu soat ) or ( binh duong qua san chien toan ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh ((dung dang) OR (dung danh)) van hieu soat ) or ( binh duong qua san chien toan ))*.