Perhaps you should try some spelling variations:
"harvard cold war studies book series." » "harvard cold war studies from series.", "harvard cold case studies book series.", "harvard cold bank studies book series.", "harvard world war studies book series."
"Harvard Cold War studies fuel sources." » "Harvard Cold War studies from sources.", "Harvard Cold War studies food sources.", "Harvard Cold War studies led sources.", "Harvard Cold War studies fuel source."

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: (("harvard cold war studies book series.") OR ("Harvard Cold War studies fuel sources."))~.
• Removing quotes may allow a broader search: (( harvard cold war studies book series. ) or ( Harvard Cold War studies fuel sources. ))~.
• Adding a wildcard symbol may retrieve word variants: (("harvard cold war studies book series.") or ("Harvard Cold War studies fuel sources."))*.