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, bien soan, lien son
luan cao » juan cao, luan bao, quang cao
quan va » quan vi, quan ha, luan va
bien so » bien doi

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 so)) ))~.
• 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 so)) )).
• Adding a wildcard symbol may retrieve word variants: (( trinh dung luan cao hieu soat ) or ( tinh luong quan va ((lien soat) or (bien so)) ))*.