Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran tung manh snippets" » "tran hung manh snippets", "tran dung manh snippets", "tran quang manh snippets", "tran duong manh snippets", "tran luong manh 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 tung manh 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 tung manh snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug core snippets\"))*".
• Removing quotes may allow a broader search: (((( tran tung manh snippets ) OR ( dung java java snippets ))) OR ( locating bug core snippets ))*.