Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi quan den snippets" » "moi quan den snippets", "do quan den snippets", "noi quan den snippets", "doi quan doan snippets", "doi quan he snippets", "doi 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: (((("doi 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: (((("doi quan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi quan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi quan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.