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