Perhaps you should try some spelling variations:
personal communication » interpersonal communication
information based » information case, information bank, transformation based
technologies ser » technologies series, technologies sector, technologies _
ser information » user information, der information, users information
keys personal » des personal, helps personal, des personals
4 developing » 3 developing
developing 1 » developing _, developing a, developing e
based keys » based key
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 ser information based keys personal communication costs 4 developing 1 africa.*.