Perhaps you should try some spelling variations:
sach tranh » canh tranh
tranh cong » thanh cong, trinh cong, tran cong
danh tranh » canh tranh, danh thanh, lanh tranh
cong thai » hong thai, cong thanh, cong tac
cong hai » cong ha, hoang hai, cong tac
cong khi » khong khi, co khi, cong ha
te sach » toc sach
te danh » le danh, tac danh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tranh ((cong thai) OR (cong hai)) đong luc ) OR ( te danh tranh cong khi đong luc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach tranh ((cong thai) OR (cong hai)) đong luc ) or ( te danh tranh cong khi đong luc ))~".
• Adding a wildcard symbol may retrieve word variants: (( te sach tranh ((cong thai) OR (cong hai)) đong luc ) or ( te danh tranh cong khi đong luc ))*.