Perhaps you should try some spelling variations:
trinh hang » trinh han, tranh hang, trinh hanh
tinh dung » trinh dung, tin dung, tinh quang
kien soat » bien soan, kien hoa, kiem sat
dien hoat » dien hoa, dien hat, trien hoat
hang luan » tang luan
kiem soat » kiem toan
van kiem » va kiem, van kien, van hieu

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: (( tinh dung luan van ((kien soat) OR (dien hoat)) ) OR ( trinh hang luan van kiem soat ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan van ((kien soat) OR (dien hoat)) ) or ( trinh hang luan van kiem soat ))~".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van ((kien soat) OR (dien hoat)) ) or ( trinh hang luan van kiem soat ))*.