Perhaps you should try some spelling variations:
"cong luong vat slippers" » "cong thuong vat slippers", "nang luong vat slippers", "cong dong vat slippers", "cong luong va slippers", "cong luong van slippers", "cong luong tai slippers", "cong luong vat slippery", "cong luong vat 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"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong luong vat slippers"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong luong vat slippers ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong luong vat slippers"))) or ("locating bug code snippets"))*.