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