Perhaps you should try some spelling variations:
personal communication » interpersonal communication
models personal » model personal, des personal, roles personal
developing east » development east, developing a, developing asia
technologies 4 » technologies _
formation new » information new, formation des, formation et
4 developing » 3 developing
4 formation » 1 formation, a formation, 4 formulation
east africa » west africa
new models » new model
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 4 formation new models personal communication costs 4 developing east africa.*.