Perhaps you should try some spelling variations:
"dung hanh va slippers" » "dung thanh va slippers", "dang hanh va slippers", "dung danh va slippers", "dung hang va slippers", "dung hanh vi slippers", "dung hanh va slippery", "dung hanh va 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 hanh va 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 hanh va slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hanh va slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hanh va slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.