Perhaps you should try some spelling variations:
"hoa duoc dan snippets" » "hoa hoc dan snippets", "hoa duc dan snippets", "hoa duoc ban snippets", "hoa duoc dai snippets", "hoa duoc 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 duoc 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 duoc dan snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoa duoc dan snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoa duoc dan snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.