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