Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doan quan ao snippets" » "doan quang ao snippets", "dan quan ao snippets", "toan quan ao snippets", "doan quan so snippets", "doan quan am snippets", "doan quan co 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: (((("doan quan ao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan quan ao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan quan ao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan quan ao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.