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