Perhaps you should try some spelling variations:
"dung trinh java snippets" » "dung tinh java snippets", "dong trinh java snippets", "cong trinh java snippets"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung cac code snippets") OR ("dung trinh java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung cac code snippets\") OR (\"dung trinh java snippets\"))) OR (\"locating bug core snippets\"))*".
• Removing quotes may allow a broader search: (((( dung cac code snippets ) OR ( dung trinh java snippets ))) OR ( locating bug core snippets ))*.