Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu so hoc snippets" » "khu do hoc snippets", "khi so hoc snippets", "khu co hoc snippets", "khu mo hoc snippets", "khu so hoa 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: (((("khu so hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khu so hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu so hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu so hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.