Perhaps you should try some spelling variations:
"dung tran tu slippers" » "dung tren tu slippers", "hung tran tu slippers", "dang tran tu slippers", "dung tran tuan slippers", "dung tran thuy slippers", "dung tran thi slippers", "dung tran tu slippery", "dung tran tu 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 tran tu 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 tran tu slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tran tu slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tran tu slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.