You can search for identifiers within the package.
in-package search v0.2.0
coq-core.lib
Explore.Make
module S : SearchProblem
val depth_first : S.state -> S.state
val debug_depth_first : S.state -> S.state
val breadth_first : S.state -> S.state
val debug_breadth_first : S.state -> S.state