Hi Chad,
Broad but specific topical studies like this are not always easy to begin. They require you to 'partner' with Logos - it's not going to do all the work for you in surfacing the most helpful results. You need to help Logos do its job well.
In this instance, I'd probably begin with the search string Christ NEAR shadow NEAR (law, priesthood, tabernacle, temple, passover). That requires your two essential keywords (law and shadow), and one of the four topical words. That immediately surfaces a large number of relevant results. If I was preparing to preach a series on this topic, and go through the main search results, and use a passage list to identify the most relevant Bible passages for each topic, and probably a series of clippings files to note useful supporting material.
It's also worth repeating the search, but ranked "By Count". That may identify resources that are worth reading in their entirety, or at least which resources have whole chapters that are worth reading. (Although in this case, I don't think it identifies any.)
I'd also look at the Factbook entries for law, priesthood, etc., and be particularly aware of entries in dictionaries of Biblical Theology, and the IVP Dictionary of Biblical Imagery.
Does that help you get started?
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