Perhaps you should try some spelling variations:
"western european studies." » "western europe studies.", "eastern european studies."
"eastern europe studies." » "eastern europa studies.", "eastern europe sources.", "eastern europe series."
"western crop studies." » "western crops studies.", "western cross studies.", "western europe studies.", "western group studies.", "western erp studies.", "western hop studies."

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