Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khen ca hon snippets" » "khien cau hon snippets", "khan cap hon snippets", "when can hon snippets", "khen cao hon snippets", "khen cua hon snippets", "khen cay hong 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: (((("khen ca hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khen ca hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khen ca hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khen ca hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.