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