Perhaps you should try some spelling variations:
"trinh dung luan van tien hoat" » "trinh dung luan van trien hoat", "trinh dung luan van thien hoat", "trinh dung luan van tien hoa", "trinh dung luan toan tien hoat", "trinh dung luan van hieu hoat", "trinh dung luan van tuan hoat", "trinh dung lan van tien hoat"
"minh quan quan va kiem soat" » "minh quang quan va kiem soat", "minh tuan quan va kiem soat", "manh quan quan va kiem soat", "minh quan quang va kiem soat", "minh qua quan va kiem soat", "minh quan luan va kiem soat", "minh quan quan va kiem toan", "minh quan quan vi kiem soat", "minh quan quan ha kiem soat", "minh quan quan van kien soat"

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: (("trinh dung luan van tien hoat") OR ("minh quan quan va kiem soat"))~.
• Removing quotes may allow a broader search: (( trinh dung luan van tien hoat ) or ( minh quan quan va kiem soat ))~.
• Adding a wildcard symbol may retrieve word variants: (("trinh dung luan van tien hoat") or ("minh quan quan va kiem soat"))*.