Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc luan den snippets" » "hoc luan den snippets", "thuoc luan den snippets", "nuoc luan den snippets", "toc quan den snippets", "toc luan de snippets", "toc luan len 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: (((("toc luan 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: (((("toc luan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc luan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc luan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.