Perhaps you should try some spelling variations:
"dan nhuan doanh snippets" » "dan chuan doan snippets", "dan nhap doanh snippets", "doan chuan doanh snippets", "dan chan doanh snippets", "dan luan doanh snippets", "dan nhuan doanh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("dan nhuan doanh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan nhuan doanh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan nhuan doanh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan nhuan doanh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.