First, you have to remember that it is much harder to find living people. Most recent birth records are not public domain. So, you will have the most luck starting by looking for your parents, if they were born before 1940, you can find them in the census. If they were born more recently, start by looking for your grandparents. Try putting in less information, such as just a first and last name. If it is a real common name, add a state or city, or approximate birth date. If you put in all of the information and it was transcribed wrong, or the census taker got it wrong, you will not get any hits.
If you can tell us what records you are looking for, the years and location, maybe we can give you more hints.