自由格式文本再次在数据库中找到

I am tasked with matching free form text to data in a database. What I mean by freeform, is that it is a textbox, and someone can type something/anything. For the most part, these entries are valid. I would like to find a list of values from a table that resemble what was typed in. Before you ask, I have no control of said textbox, nor the people that type into it. I am looking for techniques, not specific technologies.I am tasked with matching free form text to dat