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