Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam nghe do snippets" » "nang nghe do snippets", "van nghe do snippets", "nam nghe co snippets", "nam nghe so snippets", "nam nghe di 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 nghe do 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 nghe do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam nghe do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam nghe do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.