Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"men toan chi snippets" » "mon toan chi snippets", "manh toan chi snippets", "minh toan chi snippets", "men toan cao snippets", "men tai chi snippets", "men luan chi 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: (((("men toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("men toan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( men toan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("men toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.