Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc phan hon snippets" » "dung phan hon snippets", "duc thang hon snippets", "duc phung hon snippets", "duc phan hong snippets", "duc phan hoan snippets", "duc phan hoa 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: (((("duc phan hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc phan hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc phan hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc phan hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.