Brainhunter's search engine will produce better results if you enter your basic requirements for the position. If your requirements reflect your vision of an ideal candidate, you may miss out on many qualified job seekers that do not meet all of your criteria for the ideal candidate. Remember, the more restrictive you make the skills, the fewer candidates you will receive.
The availability of a specific skill set in the job market should guide your choices here. Be careful not to narrow your search too much thereby passing over job seekers with equal but alternative types of education or experience. For example, if you are looking for a Java programmer and select that you require a Bachelors degree, you may miss a job seeker with a diploma and 6 years of Java experience. It's often best not to require a specific degree.
When selecting the minimum number of years experience, select the number of years experience you want the candidate to have with that specific skill or position. DO NOT select the number of years of overall experience.