Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khan cua he snippets" » "nhan cua he snippets", "than cua he snippets", "han cua he snippets", "khan cua che snippets", "khan cua te snippets", "khan cua le 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 cua he 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 cua he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khan cua he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khan cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.