Perhaps you should try some spelling variations:
doctor davies » doctor daniel, hector davies, doctor david
picton davies » hector davies, simon davies, wilson davies
vector davies » hector davies, vector series, peter davies
owen » open

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: (owen OR own) ((((picton davies) OR (doctor davies))) OR (vector davies)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(owen OR own) ((((picton davies) or (doctor davies))) or (vector davies))".
• Adding a wildcard symbol may retrieve word variants: (owen OR own) ((((picton davies) or (doctor davies))) or (vector davies))*.