Perhaps you should try some spelling variations:
peter bryant » peter browne, peter brett, peter brown
peter bratt » peter brett, peter brandt, peter brady
peter pratt » peter hyatt, peter part, peter plant
peter gray » peter graf, peter bray, peter ray

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: ((peter gray) OR (((((peter bratt) OR (peter bryant))) OR (peter pratt)))) (bioengineer).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((peter gray) or (((((peter bratt) OR (peter bryant))) or (peter pratt)))) (bioengineer)".
• Adding a wildcard symbol may retrieve word variants: ((peter gray) or (((((peter bratt) OR (peter bryant))) or (peter pratt)))) (bioengineer)*.