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