Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khan co cua snippets" » "khuan co cua snippets", "phan co cua snippets", "khac co cua snippets", "khan con cua snippets", "khan ca cua snippets", "khan cong cua 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: (((("khan co cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khan co cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khan co cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khan co cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.