Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"peng he han snippets" » "peng theu han snippets", "peng shi han snippets", "peng he than snippets", "peng he dan snippets", "peng he van snippets", "peng he han slippers"
"locating bug code snippets" » "locating bug code slippers", "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 han 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 han snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( peng he han snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("peng he han snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.