Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa muc cac snippets" » "khoan muc cac snippets", "khoa quoc cac snippets", "khoa duoc cac snippets", "khoa tuc cac snippets", "khoa duc cac 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 muc cac 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 muc cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa muc cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa muc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.