Perhaps you should try some spelling variations:
"cronicas alemania y medicina interna ;" » "cronicas alemanas y medicina interna ;", "cronicas alemana y medicina interna ;", "cronicas alemania de medicina interna ;", "cronicas alemania la medicina interna ;", "cronicas alemania en medicina interna ;"
"botanica mexicana de medical general ;" » "botanica mexicana de medicina general ;", "botanica mexicana de medicas general ;", "botanica mexicana de mexicali general ;", "botanica mexicana de medicago general ;"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("cronicas alemania y medicina interna ;") OR ("botanica mexicana de medical general ;"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"cronicas alemania y medicina interna ;\") OR (\"botanica mexicana de medical general ;\"))*".
• Removing quotes may allow a broader search: (( cronicas alemania y medicina interna ; ) OR ( botanica mexicana de medical general ; ))*.