Perhaps you should try some spelling variations:
tinh luong » tinh huong, dinh luong, minh luong
luong quan » thong quan, duong qua
hieu soat » hieu suat, hieu hoat, hieu luat
lien soat » kiem soat, lien son, dien hoat
bien soan » bien so
luan cao » juan cao, luan bao, quang cao
quan va » quan vi, quan ha, luan va

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 luan cao hieu soat ) or ( tinh luong quan va ((lien soat) or (bien soan)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( trinh dung luan cao hieu soat ) OR ( tinh luong quan va ((lien soat) OR (bien soan)) )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dung luan cao hieu soat ) or ( tinh luong quan va ((lien soat) or (bien soan)) ))*.