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