To qualify for a specific funding opportunity, your project must meet the criteria set by the funder. If your project didn't qualify for an offer, most likely it didn't meet the criteria. It's also possible that the funding for that offer ran out, so no additional requests can qualify.
A list of current opportunities is available on our match offers page. If you want to submit a project for a specific funding offer, read the description carefully to make sure your project meets all the criteria. In most cases, your project will qualify automatically once it's live (unless otherwise indicated in the help center article for that specific funding opportunity).