Perhaps you should try some spelling variations:
"clinicas mexicano en medicina interna ;" » "clinicas mexicanas en medicina interna ;", "clinical medicine en medicina interna ;", "clinica medica en medicina interna ;", "clinicas mexicanos en medicina interna ;", "clinicas mexicana en medicina interna ;", "clinicas mexico en medicina interna ;", "clinicas mexicano de medicina interna ;", "clinicas mexicano la medicina interna ;"
"fisica medicina en medicina interna ;" » "fisica mediciones en medicina interna ;", "fisica medicina de medicina interna ;", "fisica medicina la medicina interna ;", "fisica medicina del 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: (("clinicas mexicano en medicina interna ;") or ("fisica medicina en medicina interna ;"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("clinicas mexicano en medicina interna ;") OR ("fisica medicina en medicina interna ;")).
• Removing quotes may allow a broader search: (( clinicas mexicano en medicina interna ; ) or ( fisica medicina en medicina interna ; )).
• Adding a wildcard symbol may retrieve word variants: (("clinicas mexicano en medicina interna ;") or ("fisica medicina en medicina interna ;"))*.