Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"_ many zhang snippets" » "_ manh thang snippets", "_ ming zhang snippets", "_ yan zhang snippets", "_ manh zhang snippets", "_ may zhang snippets", "_ many zhang slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("python using java snippets") or ("_ many zhang snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("_ many zhang snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( _ many zhang snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("_ many zhang snippets"))) or ("locating bug code snippets"))*.