Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc con can snippets" » "duc cong can snippets", "duc ton can snippets", "duc cuong can snippets", "duc co can snippets", "duc con ban snippets", "duc con cac 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: (((("duc con can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc con can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc con can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc con can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.