Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam de hoan snippets" » "nam le hoang snippets", "nam duc hoan snippets", "nam ve hoang snippets", "nam da hoan snippets", "nam do hoan snippets", "nam he hoan 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: (((("nam de hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam de hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam de hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam de hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.