Perhaps you should try some spelling variations:
information context » information content, information contents, information centers
oral communication » personal communication
13.4 developing » 1.4 developing, 12.4 developing, 10.4 developing
developing e » developing _, developing a, developing east
context 2.5 » context 2.1, context 2.3, context 2.2
costs 13.4 » costs 11.4, costs 12.4, costs 23.4
2.5 oral » 4.5 oral
e africa » em africa, de africa, eu africa

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

• Adding a wildcard symbol may retrieve word variants: technologien _ information context 2.5 oral communication costs 13.4 developing e africa.*.