Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam thi son snippets" » "nam thai son snippets", "nam chi son snippets", "nam thu son snippets", "nam thi song snippets", "nam thi mon 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 thi son 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 thi son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam thi son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam thi son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.