Perhaps you should try some spelling variations:
thang kieu » trang kien, thang tien, thanh lieu
cong thang » cong thanh, cang thang, cong thong
dang cong » dung cong
hieu soat » hieu suat, hieu hoat, hieu luat
tin dang » tin dung, tin nang, tin mang
kieu thu » tieu thu, kien thuc
dat van » dao van, dam van, hat van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( trinh dung ((dat van) OR (dat va)) hieu soat ) or ( tin dang cong thang kieu thu ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung ((dat van) OR (dat va)) hieu soat ) OR ( tin dang cong thang kieu thu ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( trinh dung ((dat van) OR (dat va)) hieu soat ) or ( tin dang cong thang kieu thu ))*".