Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoan vi he snippets" » "khoan va he snippets", "khoan di he snippets", "khoan viet he snippets", "khoan vi ha snippets", "khoan gi he 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: (((("khoan vi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoan vi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoan vi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoan vi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.