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