Perhaps you should try some spelling variations:
change development » changing development, chinese development, enhance development
communication cost » communication costs, communication costa, communications costs
development acute » development act, development route, development age
pt communication » put communication, et communication, post communication
technology 16.6 » technology 1.6, technology 15.6, technology 17.6
16.6 relations » 1.2 relations, 1.4 relations, 16.4 relation
relations 3.1 » relations 2.1, relations 1, relations _
acute aortic » after aortic
cost change » coast changes, must change, fast change
3.1 crisis » 2.1 crisis, 3 crisis, 11 crisis
crisis pt » crisis _, crisis a

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

• Adding a wildcard symbol may retrieve word variants: technology 16.6 relations 3.1 crisis pt communication cost change development acute aortic.*.