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