Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khan xa cao snippets" » "khan ma cao snippets", "phan xay cao snippets", "khan cap cao snippets", "khan va cao snippets", "khan ca cao 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 xa cao 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 xa cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khan xa cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khan xa cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.