Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mat manh hon snippets" » "mai manh hon snippets", "van manh hon snippets", "mat ma hon snippets", "mat manh ho snippets", "mat minh hon snippets", "mat manh huong 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 manh hon 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 manh hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mat manh hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mat manh hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.