Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau van du snippets" » "dao van du snippets", "dam van du snippets", "dau va du snippets", "dau van duy snippets", "dau van dau snippets", "dau 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: (((("dau 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: (((("dau van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.