Perhaps you should try some spelling variations:
"the eastern campaign" » "the eastern carpathian", "the eastern comparison", "the last campaign"
"the eastern company" » "the eastland company", "the masterful company", "the external company"
"the poster campaign" » "the center campaign", "the former campaign", "the motor campaign"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("the eastern company") OR ((("the eastern campaign") OR ("the poster campaign")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"the eastern company\") or (((\"the eastern campaign\") OR (\"the poster campaign\"))))".
• Removing quotes may allow a broader search: (( the eastern company ) or ((( the eastern campaign ) OR ( the poster campaign )))).
• Adding a wildcard symbol may retrieve word variants: (("the eastern company") or ((("the eastern campaign") OR ("the poster campaign"))))*.