Perhaps you should try some spelling variations:
philip hohn » philipp hohn, philip john, philip hoby
philip hans » phil hans, philip henry
philip hen » philip henry, philip hunt, philip h
biochemistry » chemistry

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: ((((philip hen) OR (philip hohn))) OR (philip hans)) (british (biochemist OR biochemistry)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((philip hen) OR (philip hohn))) or (philip hans)) (british (biochemist or biochemistry))".
• Adding a wildcard symbol may retrieve word variants: ((((philip hen) OR (philip hohn))) or (philip hans)) (british (biochemist or biochemistry))*.