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 sung nam van hiep hoa" » "tinh dung nam van hiep hoa", "tinh hung nam van hiep hoa", "tinh sang nam van hiep hoa", "tinh quang nam van hiep hoa", "tinh dong nam van hiep hoa", "tinh sung nam van hieu hoa", "tinh sung nam van hien hoa", "tinh sung nam van chien hoa", "tinh sung nam van hien khoa", "tinh sung nam van dien hoa", "tinh sung nam dan hiep hoa", "tinh sung nam va hiep hoa", "tinh sung pham 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 sung nam van hiep hoa"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("trinh dung luan van kiem soat") OR ("tinh sung nam van hiep hoa"))*.
• Removing quotes may allow a broader search: (( trinh dung luan van kiem soat ) or ( tinh sung nam van hiep hoa ))*.