Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran tranh luan snippets" » "tran thanh luan snippets", "trang trinh luan snippets", "trong tranh luan snippets", "tran trinh luan snippets", "tran trinh luat snippets", "tran doanh luan snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("tran tranh luan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("tran tranh luan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( tran tranh luan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("tran tranh luan snippets"))) or ("locating bug core snippets"))*.