Perhaps you should try some spelling variations:
communication model » communication media
development center » development case
information needs » information networks
case information » care information, based information, phase information
techniques case » techniques laser, techniques based, techniques cost
3.1 development » 2 development
center africa » centers africa, century africa, century african
needs one » need one, needs more
model 3.1 » model 3.2, model 1

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

• Adding a wildcard symbol may retrieve word variants: techniques case information needs one _ communication model 3.1 development center africa.*.