Perhaps you should try some spelling variations:
thong luong » thuong luong, thong duong, thong huong
minh thong » minh thuong, minh tuong, minh thang
hieu soat » hieu suat, hieu hoat, hieu luat
van chien » van hien, van tien
luong va » dung va
van hieu » cao hieu
va hieu » va dieu, va hien, cao hieu
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: (( minh thong luong va hieu soat ) or ( trinh dung luan ((van chien) OR (van hieu)) soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( minh thong luong va hieu soat ) OR ( trinh dung luan ((van chien) OR (van hieu)) soat ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( minh thong luong va hieu soat ) or ( trinh dung luan ((van chien) OR (van hieu)) soat ))*".