Perhaps you should try some spelling variations:
"python using real snippets" » "python using metal snippets", "python using raw snippets"
"van cau luc slippers" » "van dau luc slippers", "van hau luc slippers", "van chat luc slippers", "van cau truc slippers", "van cau phuc slippers", "van cau luc slippery", "van cau luc grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using real snippets\") OR (\"van cau luc slippers\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using real snippets ) OR ( van cau luc slippers ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using real snippets") OR ("van cau luc slippers"))) OR ("locating bug code snippets"))*.