Searching data from database by giving condiition from asp.n

Question

Hello,
  I am trying to make one page in asp.net that searches the data from database on the basis of particular parameter giving by user. user have choice to give one or more parameter for searching. 

ex:- if user want to search jobs in database then he can search job on the basis of position or year of experience + position, or company name + Year of exp + position. 

so please help me by giving your valuable ideas.

Thank you in advance.