Perhaps you should try some spelling variations:
biomedical scientists » biomedical scientific, medical scientists, biomedical sciences
robert walter » robert walters, roberts walter, robert walker
robert walsh » robert walser, robert welch, robert walsers
robert walt » robert watt, robert wait, robert watts

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: ((robert walsh) OR (((robert walt) OR (robert walter)))) (biomedical scientists).
• Adding a wildcard symbol may retrieve word variants: ((robert walsh) or (((robert walt) or (robert walter)))) (biomedical scientists)*.