Perhaps you should try some spelling variations:
tinh khong » tinh khang, tinh huong, benh khong
khong quan » thong quan, hong quan, thong quang
quan thanh » ban thanh, van thanh
thanh liem » thanh vien
hieu soat » hieu suat, hieu hoat, hieu luat
liem soat » kiem soat, kiem sat
luan va » luat va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung ((luan va) OR (luan van)) hieu soat ) OR ( tinh khong quan thanh liem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tin dung ((luan va) OR (luan van)) hieu soat ) or ( tinh khong quan thanh liem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( tin dung ((luan va) OR (luan van)) hieu soat ) or ( tinh khong quan thanh liem soat ))*.