Perhaps you should try some spelling variations:
"nhan quoc 1 snippets" » "han quoc 1 snippets", "phan quoc 1 snippets", "nhan cuoc 1 snippets", "nhan duoc 1 snippets", "nhan quoc 2 snippets", "nhan quoc _ snippets", "nhan quoc 1 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", "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: (((("nhan quoc 1 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan quoc 1 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan quoc 1 snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan quoc 1 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.