Perhaps you should try some spelling variations:
"trinh dung luan van kiem soat" » "trinh dung luan van kiem toan", "trinh dung luan va kiem soat", "trinh dung luan van kien soat", "trinh dung luan van hieu soat", "trinh dung quan van kiem soat", "trinh dung lan van kiem soat"
"tinh dung lam van hiep hoa" » "tin dung lam van hiep hoa", "tinh quang lam van hiep hoa", "tinh huong lam van hiep hoa", "tinh dung tai van hiep hoa", "tinh dung dat van hiep hoa", "tinh dung ha van hiep hoa", "tinh dung lam van hieu hoa", "tinh dung lam van hien hoa", "tinh dung lam van chien hoa", "tinh dung lam van hien khoa", "tinh dung lam van dien hoa", "tinh dung lam san hiep hoa", "tinh dung nam van hiep hoa", "tinh dung dam van hiep hoa"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("trinh dung luan van kiem soat") or ("tinh dung lam van hiep hoa"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("trinh dung luan van kiem soat") OR ("tinh dung lam van hiep hoa"))*.
• Removing quotes may allow a broader search: (( trinh dung luan van kiem soat ) or ( tinh dung lam van hiep hoa ))*.