Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong cac code snippets" » "cuong cac code snippets", "cong tac code snippets", "cong cau code snippets", "cong cac cong snippets", "cong cac co snippets", "cong cac che snippets"
"locating bug core snippets" » "locating bug 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: "((((\"dung java java snippets\") OR (\"cong cac code snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( cong cac code snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("cong cac code snippets"))) OR ("locating bug core snippets"))*.