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