Perhaps you should try some spelling variations:
"tinh quang luat van tien soat" » "tinh quan luan van tien soat", "tinh quang cua van tien soat", "tinh quang tuan van tien soat", "tinh quang luat van trien hoat", "tinh quang luat van thien hoat", "tinh quang luat van tien hoa", "tinh quang luan van tien soat", "tinh quang luat dan tien soat", "tinh quang luat va tien soat", "tinh quang luat toan tien soat", "tinh quang luat van hieu soat", "tinh quang luat van tuan soat"
"tinh dung luan va kiem soat" » "trinh dung luan va kiem soat", "tin dung luan va kiem soat", "tinh huong luan va kiem soat", "tinh dung luan va kiem toan", "tinh dung luan van kiem soat", "tinh dung luat va kiem soat", "tinh dung luan van kien soat"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("tinh dung luan va kiem soat") or ("tinh quang luat van tien soat"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("tinh dung luan va kiem soat") OR ("tinh quang luat van tien soat")).
• Removing quotes may allow a broader search: (( tinh dung luan va kiem soat ) or ( tinh quang luat van tien soat )).
• Adding a wildcard symbol may retrieve word variants: (("tinh dung luan va kiem soat") or ("tinh quang luat van tien soat"))*.