Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
missing development » missions development, mining development, mission development
technology case » technology based, technology can, technology change
case selection » sample selection
politics data » logistics data, politics duane, politics a
costs missing » costs arising, costs timing, costs using
selection a » selection _, selection bias, selection 3.2
a politics » 2 politics, a political
a aortic » _ aortic, _ artic

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

• Adding a wildcard symbol may retrieve word variants: technology case selection a politics data communications costs missing development a aortic.*.