Perhaps you should try some spelling variations:
"dung trinh quan slippers" » "dung tinh quan slippers", "dong trinh quan slippers", "cong trinh quan slippers", "dung tinh quang slippers", "dung trinh luat slippers", "dung trinh han slippers", "dung trinh quan slippery", "dung trinh quan 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 trinh quan 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 trinh quan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung trinh quan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung trinh quan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.