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