Perhaps you should try some spelling variations:
communication conversation » communication information, communication communication, communication foundation
communication cohesion » communication collections, communication control, communication cost
dispersion lenses » dispersion losses, dispersion laser, dispersion measures
based dispersion » wave dispersion, gas dispersion, based discussion
lenses pt » senses pt, lenses _, lenses a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((communication conversation) or (communication cohesion)) based dispersion lenses pt~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((communication conversation) OR (communication cohesion)) based dispersion lenses pt.
• Adding a wildcard symbol may retrieve word variants: ((communication conversation) or (communication cohesion)) based dispersion lenses pt*.