Perhaps you should try some spelling variations:
"cong trinh luan van thi cong va luong" » "cong trinh quan van thi cong va luong", "cong trinh han van thi cong va luong", "cong trinh toan van thi cong va luong", "cong trinh luan van tai cong va luong", "cong trinh luan van thien cong va luong", "cong trinh luan van thi cong van luong", "cong trinh luan van thi cong va tuong", "cong trinh luan van thi cong va huong", "cong trinh luan dan thi cong va luong", "cong trinh luan tran thi cong va luong", "cong trinh luan van thi dong va luong", "cong trinh luan van thi cong tac luong", "cong trinh luan van thi luong va luong"
"cong trinh luat van thu cong ha long" » "cong trinh luat dan thu cong ha long", "cong trinh luat va thu cong ha long", "cong trinh luat ban thu cong ha long", "cong trinh luat van thu cong hoa long", "cong trinh luat van thu dong ha long", "cong trinh luat van thu cong tac long", "cong trinh luat van thu cong hai long", "cong trinh luat van thu cong ha dong", "cong trinh luat van thu cong chat long"

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 thi cong va luong") or ("cong trinh luat van thu cong ha long"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cong trinh luan van thi cong va luong") OR ("cong trinh luat van thu cong ha long")).
• Removing quotes may allow a broader search: (( cong trinh luan van thi cong va luong ) or ( cong trinh luat van thu cong ha long )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van thi cong va luong") or ("cong trinh luat van thu cong ha long"))*.