Perhaps you should try some spelling variations:
"vi luong code slippers" » "vi luong cong slippers", "vi luong che slippers", "dai luong code slippers", "van luong code slippers", "hai luong code slippers"
"using java java snippets" » "using data 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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vi luong code slippers\") OR (\"using java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( vi luong code slippers ) OR ( using java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("vi luong code slippers") OR ("using java java snippets"))) OR ("locating bug code snippets"))*.