You can try to write some code to index that specific page programmatically - can be a simple aspx page. Then when you run that page you can see the problem with indexing.
You could also check out inspect in index for simple reindexing of single pages
I am facing a problem regarding epi find indexing. I have observed some time one of my pages not able to index. I can not see this page by following he below step:-
Find--> OverView --> Explorer.
Since it is not indexed I am not able to find it epi find query as well.
Any one can help me to let me know why it is happening.