Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach de hoa snippets" » "cach de khoa snippets", "cach de hoan snippets", "cach do hoa snippets", "cac de hoa snippets", "sach de hoa 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: (((("cach de hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cach de hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach de hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach de hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.