'in-depth connection' is correct and usable in written English.
You can use it when you want to suggest that two things are strongly connected on a deep level, or when you want to describe a relationship that is more thorough or profound than usual. For example: "The in-depth connection between two cultures was revealed through their shared beliefs and traditions."
It seems to me that we are rapidly learning to substitute what we really need -- warm, intimate, in-depth connection and communication -- with symbols of being connected.
Having these practitioners on campus for an extended time lets students develop a more in-depth connection with the many terrific lawyers working for social justice.
For many people who live in rural communities around the world, consuming the prized traditional foods requires access to traditional lands, time and resources, and an in-depth connection with the local environment to understand the ingredients and timing of an optimal harvest.
It's a marketplace in which consumers are trying to make in-depth connections with smaller and smaller groups".
More in-depth connections among the STEM disciplines are further advocated in the US Common Core State Standards for Mathematics (http://www.corestandards.org/Math/) as well as the Next Generation Science Standards (http://www.nextgenscience.org/).org/
The social network is geared around in-depth human connection, which is something you apparently don't get on Facebook.
Both the Harley-Davidson Museum andealershipsps were designed to leverage elements of the Patio (a semiprivate place that facilitates in-depth, meaningful connections) and the Bar (a public space that grants reliable but shallow connections) to foster different types of interpersonal connections.
A semiprivate place that facilitates in-depth, meaningful connections.
Further, three dimensional nonlinear finite element analyses were conducted for each test specimen to demonstrate the in-depth behavior of the connection.
A numerical investigation was subsequently performed to enable a more in-depth understanding of the connection behaviour, and it was further shown that increasing the preload levels of either the SMA washers or the SMA bolts could effectively increase the connection stiffness.
(A 27-year-old man, in-depth interview) The close connection between drug addiction and HIV nurtured a social evil approach to the problem.
