Perhaps you should try some spelling variations:
verbal communication » nonverbal communication, virtual communication, oral communication
developing farmers » developing areas, developing forms, developing managers
information case » information based, information can, information costs
technologies 2 » technologies _, technologies 4
4 developing » 3 developing
best verbal » des verbal, post verbal
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information case best verbal communication costs 4 developing farmers access.*.