Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam toan von snippets" » "nam tan von snippets", "tam toan von snippets", "nam thanh von snippets", "nam toan ban snippets", "nam toan hoc snippets", "nam toan ho 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 toan von 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 toan von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam toan von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam toan von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.