Perhaps you should try some spelling variations:
"dang trinh java slippery" » "dang tinh java slippery", "dan trinh java slippery", "dong trinh java slippery"
"using a java slippers" » "using _ java slippers", "using a java 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a java slippers") OR ("dang trinh java slippery"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using a java slippers ) or ( dang trinh java slippery ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using a java slippers") or ("dang trinh java slippery"))) or ("locating bug code snippets"))*.