Perhaps you should try some spelling variations:
"python using pre snippets" » "python nursing pre snippets", "python using one snippets", "python using ph snippets"
"van chat java snippets" » "van chat va snippets", "cao chat java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

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