Perhaps you should try some spelling variations:
"dung using java snippets" » "dung ung java snippets", "dung sinh java snippets", "dung uong java snippets", "dung using data snippets"
"cong cau den snippets" » "cong cu den snippets", "cong chuc den snippets", "thong cau den snippets", "cong cap den snippets", "cong cau de snippets", "cong hau den 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: "((((\"cong cau den snippets\") OR (\"dung using java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( cong cau den snippets ) OR ( dung using java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("cong cau den snippets") OR ("dung using java snippets"))) OR ("locating bug code snippets"))*.