Intellisence not working for manually exported modules

The problem is following.

I have Mongoose Schema JS file:

When I call him I can see all of the "functions" he provides to me:

For now everything is fine ,but when I export this module it doesn't find them anymore:

I tried everything ,this problem is the same for whatever CUSTOM export I made.IntelliSense is working for node-modules ,but for my exports it not.

Please help me,because it has been 1 week since Im trying to resolve it.