Perhaps you should try some spelling variations:
"cong trinh luan van hien dung cua truong" » "cong trinh luat van hien dung cua truong", "cong trinh quan van hien dung cua truong", "cong trinh toan van hien dung cua truong", "cong trinh luan van hien dung cua trung", "cong trinh luan van hien dung xuan truong", "cong trinh luan van hien dung cac truong", "cong trinh luan van tien dung cua truong", "cong trinh luan van khien dong cua truong", "cong trinh luan van chien dong cua truong", "cong trinh luan van hieu dung cua truong", "cong trinh luan van hien dung luan truong", "cong trinh luan van hien dung cho truong"
"cong trinh han van thi cong chat luong" » "cong trinh quan van thi cong chat luong", "cong trinh han van thi cong nhat luong", "cong trinh han van thi cong cua luong", "cong trinh han van thi cong ha luong", "cong trinh han van tai cong chat luong", "cong trinh han van thien cong chat luong", "cong trinh phan van thi cong chat luong", "cong trinh nhan van thi cong chat luong", "cong trinh hanh van thi cong chat luong", "cong trinh han dan thi cong chat luong", "cong trinh han van thu cong chat luong", "cong trinh han van thi cong chat huong", "cong trinh han van thi cong chat duong"

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: (("cong trinh luan van hien dung cua truong") or ("cong trinh han van thi cong chat luong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cong trinh luan van hien dung cua truong") OR ("cong trinh han van thi cong chat luong")).
• Removing quotes may allow a broader search: (( cong trinh luan van hien dung cua truong ) or ( cong trinh han van thi cong chat luong )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van hien dung cua truong") or ("cong trinh han van thi cong chat luong"))*.