Perhaps you should try some spelling variations:
"locating bugs code slippers" » "locating bug code slippers", "locating bugs code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"
"duc hoc dan snippets" » "duoc hoc dan snippets", "luc hoc dan snippets", "du hoc dan snippets"

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 data snippets"))) or ("locating bugs code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc hoc dan snippets") OR ("python using data snippets"))) OR ("locating bugs code slippers")).
• Removing quotes may allow a broader search: (((( duc hoc dan snippets ) or ( python using data snippets ))) or ( locating bugs code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hoc dan snippets") or ("python using data snippets"))) or ("locating bugs code slippers"))*.