Perhaps you should try some spelling variations:
"cong trinh xuan dinh thien cong tac luong" » "cong trinh quan dinh thien cong tac luong", "cong trinh luat dinh thien cong tac luong", "cong trinh xay dinh thien cong tac luong", "cong trinh xuan dinh thiet cong tac luong", "cong trinh xuan dinh tien cong tac luong", "cong trinh xuan dinh chien cong tac luong", "cong trinh xuan dinh thien cong tac long", "cong trinh xuan dinh thien cong tac thuong", "cong trinh xuan dinh thien cong truc luong", "cong trinh xuan dinh thien cong ty luong"
"cong trinh luan van thi cong tac luong" » "cong trinh luat van thi cong tac luong", "cong trinh quan van thi cong tac luong", "cong trinh han van thi cong tac luong", "cong trinh luan van thi cong tac long", "cong trinh luan van thi cong tac thuong", "cong trinh luan van thi cong truc luong", "cong trinh luan van tai cong tac luong", "cong trinh luan van thi cong ty luong", "cong trinh luan dan thi cong tac luong", "cong trinh luan van thu cong tac 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 luan van thi cong tac luong") or ("cong trinh xuan dinh thien cong tac luong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("cong trinh luan van thi cong tac luong") OR ("cong trinh xuan dinh thien cong tac luong")).
• Removing quotes may allow a broader search: (( cong trinh luan van thi cong tac luong ) or ( cong trinh xuan dinh thien cong tac luong )).
• Adding a wildcard symbol may retrieve word variants: (("cong trinh luan van thi cong tac luong") or ("cong trinh xuan dinh thien cong tac luong"))*.