Perhaps you should try some spelling variations:
"tran doanh phan slippers" » "toan doanh phan slippers", "trai doanh phan slippers", "tran danh phan slippers", "tran doanh nhan slippers", "tran doan phan slippers", "tran doanh thanh slippers", "tran doanh phan slippery", "tran doanh phan grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 doanh phan slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("tran doanh phan slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( tran doanh phan slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("tran doanh phan slippers"))) or ("locating bug code snippets"))*.