Perhaps you should try some spelling variations:
quang quan » quang tuan, quang uan, quan quan
tinh dung » trinh dung, tin dung, tinh huong
dung quan » dung quang, dung luan, luong quan
hieu hoat » hieu hoa, thien hoat, hieu luat
kiem soat » kiem toan
quan van » luan van, quan luan, quan doan
van kiem » va kiem, van kien, van hieu
quan va » quan vi, quan ha, luan va
hieu so » thieu so

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

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