Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do ping chen snippets" » "do bing chen snippets", "do qing chen snippets", "do liang chen snippets", "do tieng chen snippets", "do phong chen 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: (((("do ping chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do ping chen snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do ping chen snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do ping chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.