Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"post hoc o snippets" » "post hoc co snippets", "post hoc bo snippets", "post hoc do snippets", "most hoc o snippets", "cost hoc o snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("post hoc o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("post hoc o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( post hoc o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("post hoc o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.