Perhaps you should try some spelling variations:
personal communication » interpersonal communication
gaps information » als information, gets information, laws information
technology gaps » technology gap
20 development » 2 development, 2015 development, 2007 development
information 2 » information 3
11.1 personal » 1.1.3 personal, 1.2.1 personal, 1.5.1 personal
china africa » cpia africa, china asia
costs 20 » costs 60, costs 2.3, costs 2.1
2 11.1 » 1 11.1, 2 11.4, g 11.1

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

• Adding a wildcard symbol may retrieve word variants: technology gaps information 2 11.1 personal communication costs 20 development china africa.*.