Perhaps you should try some spelling variations:
oral communication » personal communication
development aid » development a, development africa, development agenda
4 development » 2 development, 4 developing
flows bei » flows beer, flows b, flows iii
bei oral » bei meral, bei aal, i oral
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 _ information flows bei oral communication costs 4 development aid afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies _ information flows bei oral communication costs 4 development aid afrique.*.