Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ren chen snippets" » "van ben chen snippets", "van tren chien snippets", "van chen chen snippets", "van tren chen snippets", "van den chen snippets", "ban ren 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 ren 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 ren chen snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ren chen snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ren chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.