Perhaps you should try some spelling variations:
medical ontology » medical oncology, lexical ontology, medical ontologies
medical history » medieval history, medicine history
media history » india history, medieval history, asia history

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: ((medical ontology) OR (((medical history) OR (media history))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((medical ontology) or (((medical history) OR (media history))))*".