Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khen ca ca snippets" » "khien cau ca snippets", "khan cap ca snippets", "when can ca snippets", "khen ca cac snippets", "khen ca cua snippets", "khen 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: (((("khen ca ca 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 ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khen ca ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khen ca ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.