Perhaps you should try some spelling variations:
"chicas americanas de medicina interna ;" » "cronicas americanas de medicina interna ;", "cartas americanas de medicina interna ;", "chino americana de medicina interna ;", "chicas americanas del medicina interna ;", "chicas americana de medicina interna ;", "chicas americanos de medicina interna ;"
"cronica mexicana de medicina moderna ;" » "botanica mexicana de medicina moderna ;", "prensa mexicana de medicina moderna ;", "cronica mexicana de medicina medicina ;"

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