Perhaps you should try some spelling variations:
luong quan » thong quan, duong qua
quang luan » quan luan, quang tuan, quang uan
tin luong » tien luong, tin huong, tin tuong
hieu soat » hieu suat, hieu hoat, hieu luat
kien soat » kiem soat, kien hoa, dien hoat
bien soan » bien so
quan va » quan vi, quan ha, luan va
va hieu » van hieu, va dieu, va hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin luong quan va hieu soat ) or ( tinh quang luan van ((kien soat) or (bien soan)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin luong quan va hieu soat ) OR ( tinh quang luan van ((kien soat) OR (bien soan)) )).
• Adding a wildcard symbol may retrieve word variants: (( tin luong quan va hieu soat ) or ( tinh quang luan van ((kien soat) or (bien soan)) ))*.