Speaker Labels are now searchable in most original language morph Bibles and reverse interlinears. The search syntax is {Speaker <X>} where <X> is a Factbook data type reference.
Open Bible Search and designate the desired speaker.
Examples:
Speaker search function is available in Feature Crossgrade or above and Silver level packages or higher.
How can I search all the passages that state "God chose" and also find the passages that God instructs "man to choose"?
Clause search, I think. You can select subject and object like that, but the most instructive thing to do will probably be to just search verb:choose OR verb:choose for oneself;select OR... et cetera (use an interlinear to get ideas) and the sort by subject.You can also do it with the sense search (ie sense:to choose and then sort by subject).
Speaker search probably isn't the best way to find passages where God is choosing: I'd recommend clause search for that. In particular, this clause search
agent:God verb-sense:to choose
captures passages where God is doing the choosing, and captures various more specific senses for "to choose" like "to choose by lot", "to elect", and others. This search is for the NT: you'll have to repeat it to find OT passages.
Clause search for
verb-sense:to choose ANDNOT agent:God
will approximate your second example, though without the criteria of God instructing it (note that this is a precise search where Jesus and God are distinguished as agents, which may not be what you want).
I tried the second recommendation you gave and it of course yielded passages that was Jesus. So can I add to the end, OR Jesus?
This works: verb-sense:to choose ANDNOT (agent:God OR agent:Jesus)
Although, the very first result obviously has God as the untagged chooser.
If you want passages where the agent is neither God nor Jesus, you want
verb-sense:to choose ANDNOT (agent:God OR agent:Jesus )
to capture the logical grouping correctly.
This and items in replies are very interesting. Where can I find tutorial/documentation of what the various searches (Basic, Bible, Media, Clause, Morph, Syntax) do and when to use them?
Unfortunately no comprehensive help for Clause Search, but see