Perhaps you should try some spelling variations:
formation observations » radiation observations, domain observations, adaptation observations
observations general » observations genesis, observations animal, observations control
functions names » function james, functions new, functions dynamic
functions time » functions tissues

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: formation observations general ((functions names) OR (functions time)) citrus~.
• Adding a wildcard symbol may retrieve word variants: formation observations general ((functions names) or (functions time)) citrus*.