Perhaps you should try some spelling variations:
"clinicas mexicana en medicina interna ;" » "clinicas mexicanas en medicina interna ;", "cronica mexicana en medicina interna ;", "climatica mexicana en medicina interna ;", "clinicas mexicana de medicina interna ;", "clinicas mexicana la medicina interna ;"
"clinica medicine de medicina interna ;" » "clinical medicine de medicina interna ;", "clinica medica de medicina interna ;", "fisica medicina de medicina interna ;", "clinica medicina de medicina interna ;", "clinica medicins de medicina interna ;", "clinica medicina del medicina interna ;"

You may be able to get more results by adjusting your search query.

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