Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam du con snippets" » "nam dau con snippets", "nam tu con snippets", "nam da con snippets", "nam duc con snippets", "nam dung con snippets", "nam dieu con 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 du con 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 du con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam du con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam du con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.