Perhaps you should try some spelling variations:
development acute » development act, development route, development age
pt communication » put communication, et communication, post communication
technology 3.1 » technology 1, technology 2.2, technology _
20 development » 2 development, 2015 development, 2007 development
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
acute aortic » after aortic
6.3 crisis » 8.3 crisis, 6.3.2 crisis, 13.3 crisis
crisis pt » crisis _, crisis a
costs 20 » costs 60, costs 2.3, costs 2.1

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 pt communication costs 20 development acute aortic.*.