Not every thesis statement can be supported. You may search for sources to support your thesis statement - and come up empty.
Investigating Step 4: Searching for Information
Some topics may be too current or too obscure for coverage in academic journals. Or you may find too many articles to wade through if your research question is broad. Be flexible with your topic, thesis statement, and research question.
Revising them early in the process based on what you DO find will save you time in the long run.