Hello Ojanke,
It may help to have someone take a direct look at this with you, and it wouldn't hurt to be able to get a screenshot of what you're actual search looks like, but for the most part you should be able to do this already.
For example:
I have replicated what I imagine you could search for. I have braced the search terms with wildcards (*) otherwise your search won't complete if there's other data in the field.
I don't have your specific data, but that should generally work. If I'm oversimplifying let me know and give me some additional context and I'll take another look.