Perhaps you should try some spelling variations:
"kinh quang luan van kien soat" » "tinh quang luan van kien soat", "dinh quang luan van kien soat", "minh quang luan van kien soat", "kinh quan luan van kien soat", "kinh quang tuan van kien soat", "kinh quang uan van kien soat", "kinh quang luan van kiem soat", "kinh quang luan van bien soan", "kinh quang luan van kien hoa", "kinh quang luan van tien soat", "kinh quang luan van hien soat", "kinh quang luan van chien soat"
"minh xuan dang van ban thu" » "dinh xuan dang van ban thu", "minh tuan dang van ban thu", "ming xuan dang van ban thu", "minh xuan nang van ban thu", "minh xuan cang van ban thu", "minh xuan hoang van ban thu", "minh xuan hang va ban thu", "minh xuan dang van van thu", "minh xuan dang van ban thi", "minh xuan dang van ban tu"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("kinh quang luan van kien soat") or ("minh xuan dang van ban thu"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("kinh quang luan van kien soat") OR ("minh xuan dang van ban thu")).
• Removing quotes may allow a broader search: (( kinh quang luan van kien soat ) or ( minh xuan dang van ban thu )).
• Adding a wildcard symbol may retrieve word variants: (("kinh quang luan van kien soat") or ("minh xuan dang van ban thu"))*.