Perhaps you should try some spelling variations:
"dung quang hap slippers" » "dang quang hap slippers", "luong quang hap slippers", "dung luan hap slippers", "dung quang hai slippers", "dung quang ham slippers", "dung quang hop slippers", "dung quang hap slippery", "dung quang hap 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 quang hap 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 quang hap slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung quang hap slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung quang hap slippers"))) or ("locating bug code snippets"))*.