Perhaps you should try some spelling variations:
"cong trinh luat doan thien cong cua luong" » "cong trinh luat hoan thien cong cua luong", "cong trinh luat doan thi cong cua luong", "cong trinh luat toan thiet cong cua luong", "cong trinh luat doanh thien cong cua luong", "cong trinh luat dan thien cong cua luong", "cong trinh luan hoan thien cong cua luong", "cong trinh luat doan thien cong cu luong", "cong trinh luat doan thien cong cua huong", "cong trinh luat doan thien cong cua truong", "cong trinh luat doan thien dong cua luong", "cong trinh luat doan thien huong cua luong"
"cong trinh luat van thi cong chat luong" » "cong trinh luat van thi cong nhat luong", "cong trinh luat van thi cong ha luong", "cong trinh luat van thi cong suat luong", "cong trinh luan van thi cong chat luong", "cong trinh luat dan thi cong chat luong", "cong trinh luat va thi cong chat luong", "cong trinh luat van tai cong chat luong", "cong trinh luat van thu cong chat luong"

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