Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa ca ke snippets" » "khoa cam ke snippets", "khoa can ke snippets", "khoa cap ke snippets", "khoa cac ke snippets", "khoa ca ve snippets", "khoa ca me 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: (((("khoa ca ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa ca ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa ca ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa ca ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.