Perhaps you should try some spelling variations:
"phong van code slippers" » "phung van code slippers", "thong van code slippers", "phong va code slippers", "phong van de slippers", "phong van hoe slippers", "phong van cong slippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("phong van code slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( phong van code slippers ) or ( dung java java snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("phong van code slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.