Perhaps you should try some spelling variations:
"politico mexicano en medicina interna ;" » "politica mexicana en medicina interna ;", "politica mexico en medicina interna ;", "politicos mexico en medicina interna ;", "politico mexicanos en medicina interna ;", "politico mexicana en medicina interna ;", "politico mexicano de medicina interna ;", "politico mexicano la medicina interna ;"
"policy mexico en medicina interna ;" » "policy mexico de medicina interna ;", "policy mexico la medicina interna ;"

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: (("politico mexicano en medicina interna ;") or ("policy mexico en medicina interna ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("politico mexicano en medicina interna ;") OR ("policy mexico en medicina interna ;")).
• Removing quotes may allow a broader search: (( politico mexicano en medicina interna ; ) or ( policy mexico en medicina interna ; )).
• Adding a wildcard symbol may retrieve word variants: (("politico mexicano en medicina interna ;") or ("policy mexico en medicina interna ;"))*.