Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cheng lu de snippets" » "cheng lin de snippets", "zheng liu de snippets", "chen yu de snippets", "cheng cu de snippets", "cheng lo de snippets", "cheng ly de 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 de 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 de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cheng lu de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cheng lu de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.