Perhaps you should try some spelling variations:
"python using java slippery" » "python using data slippery"
"van de nhan slippers" » "van do nhan slippers", "van tue nhan slippers", "van de thanh slippers", "van de nhan 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: "((((\"van de nhan slippers\") OR (\"python using java slippery\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( van de nhan slippers ) OR ( python using java slippery ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("van de nhan slippers") OR ("python using java slippery"))) OR ("locating bug code snippets"))*.