Perhaps you should try some spelling variations:
picton davies » hector davies, doctor davies, simon davies
vector davies » hector davies, doctor davies, sector david
vector series » vector species, vector derived, vector splines
peter davies » peter davis, peter daniels, peter david
owen » open, own

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