Perhaps you should try some spelling variations:
1977 communication » 19 communication, 7 communication, 1 communication
information last » information list, information lost, information law
der information » insider information, sector information, labor information
technology der » technology does, technology 4ir, technology dlt
3.3 developing » 4 developing, 2 developing, 1 developing
developing e » developing _, developing a, developing east
decade 1977 » decade 1917, decade 1987, decade 1997
costs 3.3 » costs 2.3, costs 3.5, costs 4.3
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: technology der information last decade 1977 communication costs 3.3 developing e africa.*.