Perhaps you should try some spelling variations:
tinh luong » tinh huong, dinh luong, minh luong
luong quan » thong quan, duong qua
trien hoat » tien hoa
quang quan » quang tuan, quang uan, quan quan
hieu soat » hieu suat, hieu hoat, hieu luat
tien soat » thien hoat, kiem soat, tien hoa
quan van » luan van, quan va, quan luan
van tien » toan tien, van hieu, van tuan

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

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