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