Perhaps you should try some spelling variations:
communication conversation » communication information, communication cohesion, communication communication
conversation based » conversion based, conversation basic, conversation made
dispersion chapter » diversion chapter, _ dispersionchapter, dispersionchapter 5
based dispersion » wave dispersion, gas dispersion, based discussion
chapter like » chapter 2i, cutter like

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 based dispersion chapter like~.
• Adding a wildcard symbol may retrieve word variants: communication conversation based dispersion chapter like*.