Perhaps you should try some spelling variations:
communications costly » communications costs, communication costs, communication costa
trade development » software development
based innovation » und innovation
2 communications » 2 communication, 3 communications, 4 communications
innovation 3 » innovation 1, innovation 4
costly trade » costs trade, country trade, costly than
3 re » 3 pre, _ re, 2 re
re 2 » red 2, rec 2, rev 2

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

• Adding a wildcard symbol may retrieve word variants: technology based innovation 3 re 2 communications costly trade development africa _.*.