Perhaps you should try some spelling variations:
"doan duong dat snippets" » "doan cuong dat snippets", "doan huong dat snippets", "doan phuong dat snippets", "doan dung dat snippets", "doan dong dat snippets", "doan duong dao snippets", "doan duong dat 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: (((("doan duong dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan duong dat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan duong dat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan duong dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.