Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khach dan da snippets" » "khach san da snippets", "khach hang da snippets", "nhac dan da snippets", "khach dan dat snippets", "khach dan ca snippets", "khach dan va 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: (((("khach dan da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khach dan da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khach dan da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khach dan da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.