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