Perhaps you should try some spelling variations:
face communication » voice communication, de communication, time communication
development age » development stage, development a, development aid
technology 3.1 » technology 1, technology 2.2, technology _
3.1 relation » 4.1 relation, 3.1 regulation, 2.3.1 relation
relation 6.3 » relations 6.3, relation 4.3, relation 5.3
crisis face » crisis race, crisis fair, crisis finance
6.3 crisis » 8.3 crisis, 6.3.2 crisis, 13.3 crisis
age aortic » acute aortic, after aortic
costs 2 » costs 20, costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology 3.1 relation 6.3 crisis face communication costs 2 development age aortic.*.