Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luat hoi cao snippets" » "luat moi cao snippets", "luat so cao snippets", "luat dai cao snippets", "luat hoc cao snippets", "luat hoi co snippets", "luat hoi cho 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: (((("luat hoi 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: (((("luat hoi cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luat hoi cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luat hoi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.