Perhaps you should try some spelling variations:
personal communications » personal communication, interpersonal communications, internal communications
communications costs » communication costs, communications _
series information » business information
developing areas » developing asia, developing east, developing a
information 2 » information 3
per personal » der personal, paper personal, mehr personal
3 developing » 3 development
areas areas » areas arenas, seas areas, areas access
costs 3 » costs _, costs 4, costs a
2 per » 2 peru, _ per, d per

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

• Adding a wildcard symbol may retrieve word variants: technology series information 2 per personal communications costs 3 developing areas areas.*.