Perhaps you should try some spelling variations:
open communication » human communication, 3 communication, 4 communication
communication std » communication study, communication set, communication sur
development acute » development act, development route, development age
relations 2.4 » relations 2.1, relations 2.5, relations 3.4
technology 1 » technology _
acute aortic » after aortic
1 relations » 3 relations, a relations, 1.2 relations
crisis open » crisis one, crisis over, crisis onset
2.4 crisis » 2.1 crisis, 2.2 crisis, 2.5 crisis
std sector » std vector, seed sector, sme sector

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

• Adding a wildcard symbol may retrieve word variants: technology 1 relations 2.4 crisis open communication std sector development acute aortic.*.