Perhaps you should try some spelling variations:
tinh huong » dinh huong, tinh quang, anh huong
huong luan » huong lan, cuong luan, huong loan
kiem soat » kiem toan
van hieu » cao hieu
dung cua » dung luan, dung cho
quan cua » quan luan, ban cua, gian cua
va kiem » van kien

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 huong luan van hieu qua ) OR ( tinh ((dung cua) OR (quan cua)) va kiem soat ))~.
• Adding a wildcard symbol may retrieve word variants: (( tinh huong luan van hieu qua ) or ( tinh ((dung cua) or (quan cua)) va kiem soat ))*.