It could be because of a number of things, some of the most common reasons being that... - They cannot properly determine the purpose of your trip: your reasons for traveling might be insinuating a different purpose (e.g. you're applying for tourism purposes when you're actually seemingly intending to study in France) - They cannot see your strong ties to the Philippines: you're probably newly resigned, you failed to provide information of your employment, etc. etc. - They deem you as having insufficient funds for your trip: if you're not in good financial standing, it usually helps to take on a sponsor.