Perhaps you should try some spelling variations:
1990 communication » 10 communication, 19 communication, 1 communication
user information » der information, other information, user innovation
information case » information based, information can, information costs
technology user » technology users, technology use, technology used
3.3 developing » 4 developing, 2 developing, 1 developing
developing a » developing _
case decade » last decade, past decade, cases decided
decade 1990 » decade 1996, decade 1997, decade 1930s
costs 3.3 » costs 2.3, costs 3.5, costs 4.3
a africa » 1 africa, can africa, em africa

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

• Adding a wildcard symbol may retrieve word variants: technology user information case decade 1990 communication costs 3.3 developing a africa.*.