using 2 wildcards anywhere in the html5 input pattern

I'm working with a word search system, I should be able to use wildcards in the input. The pattern I use works but it only allows me to use wildcards at the end of the word. I should be able to use it anywhere. Can you help with Regex?

My input pattern:

"[a-zA-ZğüşöçıİĞÜŞÖÇI] + [? \ *] {0,2}"

Example : "SEARCH**" "SEARCH?*" "SEARCH??"

i want : "SEARCH" or "S?EAR?CH" or "?SEARCH" or "SEARCH*" or "SEARCH??"