Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam han lon snippets" » "nam phan lon snippets", "nam huan lon snippets", "nam dan lon snippets", "nam han tong snippets", "nam hai long snippets", "nam phan lan 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 han lon 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 han lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam han lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam han lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.