Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran tong quan snippets" » "tran trong quan snippets", "tran thong quan snippets", "tran tuong quan snippets", "tran tong luan snippets", "tran luong quan snippets"
"dung java java snippets" » "dung va java snippets"

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

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