Perhaps you should try some spelling variations:
"scale immigration studies." » "scale immigration judges.", "scale immigration status.", "scale immigration rules.", "scale irrigation studies.", "scale integration studies.", "local immigration studies."
"scale migration studies." » "female migration studies.", "trade migration studies.", "scale integration studies."
"male migration studies." » "female migration studies.", "die migration studies.", "climate migration 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: (("scale immigration studies.") or ((("scale migration studies.") OR ("male migration studies."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("scale immigration studies.") OR ((("scale migration studies.") OR ("male migration studies.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"scale immigration studies.\") or (((\"scale migration studies.\") OR (\"male migration studies.\"))))".
• Removing quotes may allow a broader search: (( scale immigration studies. ) or ((( scale migration studies. ) OR ( male migration studies. )))).
• Adding a wildcard symbol may retrieve word variants: (("scale immigration studies.") or ((("scale migration studies.") OR ("male migration studies."))))*.