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