Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam tra cho snippets" » "nam tro cho snippets", "nam thai cho snippets", "dam trao cho snippets", "nam trang cho snippets", "nam tra chat snippets", "nam toan cho 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 tra cho 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 tra cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam tra cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam tra cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.