Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khach san de snippets" » "khach hang de snippets", "thanh san de snippets", "khach van de snippets", "khach dan de snippets", "khach jan de 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 san de 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 san de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khach san de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khach san de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.