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