Perhaps you should try some spelling variations:
"medical meteorology" » "medieval meteorology", "medical methodology", "numerical meteorology"
"medical astrology" » "medieval astrology", "judicial astrology", "medicine astrology"
"medical metrology" » "medical neurology", "biomedical metrology", "medical methodology"

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 astrology") OR ((("medical metrology") OR ("medical meteorology"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"medical astrology\") or (((\"medical metrology\") OR (\"medical meteorology\"))))*".
• Removing quotes may allow a broader search: (( medical astrology ) or ((( medical metrology ) OR ( medical meteorology ))))*.