Perhaps you should try some spelling variations:
"cronicas americanos de medicina interna ;" » "cronicas americanas de medicina interna ;", "colonias americanas de medicina interna ;", "chicas americanas de medicina interna ;", "cronicas americana de medicina interna ;", "cronicas americano en medicina interna ;"
"carta africana de medicina interna ;" » "art african de medicina interna ;", "palma africana de medicina interna ;", "arte africano de medicina interna ;", "carta americana de medicina interna ;", "carta africana en 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: (("cronicas americanos de medicina interna ;") OR ("carta africana de medicina interna ;"))~.
• Removing quotes may allow a broader search: (( cronicas americanos de medicina interna ; ) or ( carta africana de medicina interna ; ))~.
• Adding a wildcard symbol may retrieve word variants: (("cronicas americanos de medicina interna ;") or ("carta africana de medicina interna ;"))*.