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As I can understand you want to have the ability to find a form by searching for the content in it, for example, if you have added some text, header or field using the word "Place" then if you type "Place" in the search box you want this to show the forms with either the title or fields/text in it similar to your search, so is not necessary that a form contains the word "Place" in the title, if it has it in its content then you want it to show as result.
Unfortunately, is it not possible to search forms on this way and you can only search forms by form title only; however, I will forward this thread to our second level as a feature request, though we cannot provide an ETA or ensure this will be implemented we will make sure to let you know if / when this is available.