Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"using java trac snippets" » "using data trac snippets", "using va trac snippets", "using java trac slippers"
"dung va java snippets" » "dung java java snippets", "dung va java slippers"

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 va java snippets\") OR (\"using java trac snippets\"))) OR (\"locating bugs code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung va java snippets ) OR ( using java trac snippets ))) OR ( locating bugs code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") OR ("using java trac snippets"))) OR ("locating bugs code snippets"))*.