Perhaps you should try some spelling variations:
"hoa duc dan snippets" » "hoa duoc dan snippets", "hoai duc dan snippets", "ho duc dan snippets", "hoa duc tan snippets", "hoa duc dai snippets", "hoa duc dan 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: (((("hoa duc dan snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoa duc dan snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoa duc dan snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoa duc dan snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.