Perhaps you should try some spelling variations:
medical scientists » biomedical scientists, american scientists, physical scientists
medical scientist » medical scientific, american scientist, medical sciences
robert walser » robert walker, robert warren, robert watson

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "robert walser (((medical scientist) OR (medical scientists)))".
• Adding a wildcard symbol may retrieve word variants: robert walser (((medical scientist) OR (medical scientists)))*.