Perhaps you should try some spelling variations:
"vi trung java slippers" » "vi trung va slippers", "vi trinh java slippers", "va trung java slippers", "viet trung java slippers", "vien trung java slippers", "vi trung java slippery", "vi trung java grippers"
"using raw java snippets" » "using real java snippets", "using a java snippets", "using low java snippets"
"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 raw java snippets") OR ("vi trung java slippers"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( using raw java snippets ) or ( vi trung java slippers ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using raw java snippets") or ("vi trung java slippers"))) or ("locating bug code snippets"))*.