Perhaps you should try some spelling variations:
"nhan khoa code snippets" » "nhan khoa cong snippets", "nhan khoa co snippets", "nhan khoa de snippets", "nha khoa code snippets", "khuan khoa code snippets", "toan khoa code snippets", "nhan khoa code slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("python using a snippets") or ("nhan khoa code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("nhan khoa code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( nhan khoa code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("nhan khoa code snippets"))) or ("locating bug code snippets"))*.