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