Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
huong quan » luong quan, cuong quan, vuong quan
hieu soat » hieu suat, hieu luat, kiem soat
hieu hoat » hieu hoa, thien hoat, hieu luat
quan van » luan van, quan va, quan luan
ban soat » ban soan, ban sua, ban chat

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

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