Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc van den snippets" » "luoc van den snippets", "luu van den snippets", "duc van den snippets", "luc van de snippets", "luc van der snippets", "luc ban den 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: (((("luc van den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luc van den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc van den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc van den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.