Perhaps you should try some spelling variations:
oral communication » personal communication
information case » information based, information can, information costs
development case » development china
technologies 2 » technologies _, technologies 4
4 development » 2 development, 4 developing
case africa » cases africa, care africa, curse africa
case knew » case new, case known, cases new
knew oral » knew moral, new oral, new moral
costs 4 » costs _, costs a, costs 4.2

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies 2 information case knew oral communication costs 4 development case africa.~.
• Adding a wildcard symbol may retrieve word variants: technologies 2 information case knew oral communication costs 4 development case africa.*.