Q:

How I could get back partial search results inside a GitHub repo?

When I am searching for example 'CGLI' it does not gives me back the matches for 'CGLIB':
https://github.com/SquareSquash/java/search?utf8=%E2%9C%93&q=CGLI
How can I force to give it back?

A:

Click on advanced search on the search tab, that will do what you want:
https://github.com/search?l=&q=CGLI&ref=advsearch&type=Code&utf8=%E2%9C%93
But:

You can't use the following wildcard characters as part of your search
  query: . , : ; / \ ` ' " = * ! ? # $ & + ^ | ~ < > ( ) { } [ ]. The
  search will simply ignore these symbols.
  https://help.github.com/articles/searching-code/

