Perhaps you should try some spelling variations:
"van cau danh slippery" » "van cao danh slippery", "van chuc danh slippery", "van nam danh slippery", "van dau danh slippery", "van hau danh slippery", "van chat danh slippery", "van cau danh 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"

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 a snippets\") OR (\"van cau danh slippery\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( python using a snippets ) OR ( van cau danh slippery ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") OR ("van cau danh slippery"))) OR ("locating bug code snippets"))*.