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