Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"2003 van du snippets" » "2003 va du snippets", "2003 voi du snippets", "2003 van duy snippets", "2003 van dau snippets", "2003 van de 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: (((("2003 van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("2003 van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( 2003 van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("2003 van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.