Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ke don snippets" » "van ket don snippets", "van de don snippets", "van ky don snippets", "van ke dan snippets", "van ke do snippets", "van ke doc 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 ke don 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 ke don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ke don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ke don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.