Perhaps you should try some spelling variations:
control assassin's » context assassin's
face communication » voice communication, de communication, time communication
developed control » developing control, developed country, developed content
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
information 1 » information 2, information 3, information 3.2
20 developed » 2.0 developed, _ developed, a developed
costs 20 » costs 60, costs 2.3, costs 2.1
a face » a fact

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information 1 a face communication costs 20 developed control assassin's.*.