Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van yu chen snippets" » "van yi chen snippets", "van yan chen snippets", "van cu chien snippets", "van du chen snippets", "van lu chen snippets", "van cu 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: (((("van yu 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: (((("van yu chen snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van yu chen snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van yu chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.