Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
theory information » other information, history information, fishery information
technology theory » technology thesis, technology other, technology history
5.4 communication » de communication, data communication
urban development » human development
information der » information oder, information does, informatik der
development en » developpement en, development menu, development eco
cost urban » most urban, worst urban, bust urban
der games » war games, do games, der gagen
games 5.4 » games 5.1, games 1.4, games 2.4

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

• Adding a wildcard symbol may retrieve word variants: technology theory information der games 5.4 communication cost urban development en afrique.*.