Perhaps you should try some spelling variations:
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"cong vang thuc snippets" » "cong lang thuc snippets", "cong quang thuc snippets", "cong ngang thuc snippets", "cong nang thuc snippets", "cong van thuc snippets", "cong dang thuc 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.

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