Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"juan liu de snippets" » "juan luis de snippets", "quan li de snippets", "jin liu de snippets", "juan lieu de snippets", "juan lieu 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: (((("juan liu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("juan liu de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( juan liu de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("juan liu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.