Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"li zheng lin snippets" » "li cheng lin snippets", "li zheng liu snippets", "li zhong lin snippets", "lei zheng lin snippets", "li yazheng lin snippets", "li phong lin snippets", "li zheng lin 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: (((("li zheng lin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("li zheng lin snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( li zheng lin snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("li zheng lin snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.