Perhaps you should try some spelling variations:
information robot » information robots, _ information:robot, information report
driven expression » driver expression, driven expressive, written expression
array string » array strong, arrays strings, array sharing
array arcing » array forming, array probing, array sharing
rays probing » arrays probing, gaus probing, stars probing

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

• Performing a fuzzy search may retrieve terms with similar spellings: information robot driven expression ((array string) or (((array arcing) or (rays probing))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information robot driven expression ((array string) OR (((array arcing) OR (rays probing)))).
• Adding a wildcard symbol may retrieve word variants: information robot driven expression ((array string) or (((array arcing) or (rays probing))))*.