Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"peng he mo snippets" » "peng theu mo snippets", "peng shi mo snippets", "peng he moi snippets", "peng he co snippets", "peng ke mo 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: (((("peng he mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("peng he mo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( peng he mo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("peng he mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.