Perhaps you should try some spelling variations:
"dung thu doanh slippers" » "dung thu oanh slippers", "dung tri doanh slippers", "dung thu hoach slippers", "ung thu doanh slippers", "dung phu doanh slippers", "dung thi doanh slippers", "dung thu doanh slippery", "dung thu doanh 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 thu doanh 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 thu doanh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thu doanh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thu doanh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.