Question : Windows 7 Searching a partial file name for pdf's

First of all let me vent my frustration to say that the search feature in Windows 7 is horrible. The problem that I seem to have is being able to find a partial file name for pdf files. As an example lets say I have a file named lvu22498.pdf. If I type in the entire filename, it works fine. But what if I didn't know the complete name? So if I type in 22498 it will bring up all other partial file names for word or excel but not pdf. PDF's are checked on the advanced file types for indexing but it still does not help.Any ideas?

Answer : Windows 7 Searching a partial file name for pdf's

Simply Use wild cards (*,?)

*: is any number of characters
?: only one character

lets say we need to find file abcdefgh.pdf

we may use any of these ways:
abcd*.pdf
abcd????.pdf
????efgh.pdf
and so on