Perhaps you should try some spelling variations:
"mexicana ante state social conditions." » "mexicana frente state social conditions.", "mexicana de state social conditions.", "mexicana en state social conditions.", "mexicana ante states social conditions.", "mexicana ante clase social conditions.", "mexicana ante elite social conditions."
"mexicans united state social conditions." » "mexicans united states social conditions.", "mexicans united clase social conditions.", "mexicans united elite social conditions.", "mexicans zunited states social conditions.", "mexicans unitec late social conditions."

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: (("mexicana ante state social conditions.") or ("mexicans united state social conditions."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("mexicana ante state social conditions.") OR ("mexicans united state social conditions.")).
• Removing quotes may allow a broader search: (( mexicana ante state social conditions. ) or ( mexicans united state social conditions. )).
• Adding a wildcard symbol may retrieve word variants: (("mexicana ante state social conditions.") or ("mexicans united state social conditions."))*.