Sorry but I don't know how to describe this problem. Let's see a simple example below.
Take this page as an example, when I search(cmd+F) "comp", safari is able to find everything about it; but if I search "omp", nothing can be found! (suppose I want to find strings containing "complete")
This can be inconvenient sometimes because I may forget the spelling of the first several letters of a word/string, or I may be only concerned about the postfix, namely, finding all strings with a given postfix(or 'midfix') and the prefix can be arbitrary.
Can someone explain this issue and is there a way to resolve it ?