Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao vu son snippets" » "cao su son snippets", "cao va son snippets", "cao tu son snippets", "cao vu san snippets", "cao xu son 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: (((("cao vu son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao vu son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao vu son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao vu son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.