Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nan quan den snippets" » "nang quan den snippets", "van quan den snippets", "ban quan den snippets", "nan quan doan snippets", "nan quan he snippets", "nan quan doi 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: (((("nan quan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nan quan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nan quan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nan quan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.