Perhaps you should try some spelling variations:
"dung tren trinh slippers" » "dung tien trinh slippers", "dung trang trinh slippers", "dung tra trinh slippers", "dung trong trinh slippers", "dung trung trinh slippers", "dung tren trinh slippery", "dung tren trinh 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 tren trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung tren trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tren trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tren trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.