Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"wei cheng lu snippets" » "wei zhang lu snippets", "lei zheng lu snippets", "pei chen lu snippets", "wei cheng lin snippets", "wei zheng liu snippets", "wei chen yu snippets", "wei cheng lu slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("wei cheng lu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("wei cheng lu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei cheng lu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei cheng lu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.