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

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