Perhaps you should try some spelling variations:
"cong trinh luan van thi cong chan thuong" » "cong trinh luan van thi cong phan thuong", "cong trinh luan van thi cong han thuong", "cong trinh luan van thi cong hang thuong", "cong trinh luat van thi cong chan thuong", "cong trinh quan van thi cong chan thuong", "cong trinh toan van thi cong chan thuong", "cong trinh luan van thi cong nhan thuong", "cong trinh luan van thi cong khan thuong", "cong trinh luan van thien cong chan thuong", "cong trinh luan dan thi cong chan thuong", "cong trinh luan van thu cong chan thuong", "cong trinh luan tran thi cong chan thuong"
"cong trinh han van tai cong chat huong" » "cong trinh han van tai cong chat luong", "cong trinh han van tai cong nhat huong", "cong trinh han van tai cong chap thuong", "cong trinh quan van tai cong chat huong", "cong trinh han van tai cong cua huong", "cong trinh han van tai cong ha huong", "cong trinh phan van tai cong chat huong", "cong trinh nhan van tai cong chat huong", "cong trinh hanh van tai cong chat huong", "cong trinh han von tai cong chat huong", "cong trinh han van tuan cong chat huong"

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