Perhaps you should try some spelling variations:
"dung quang liu snippets" » "dang quang liu snippets", "luong quang liu snippets", "dung luan liu snippets", "dung quang lien snippets", "dung quang dieu snippets", "dung quang linh snippets", "dung quang liu slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung quang liu snippets\") OR (\"dung java java snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung quang liu snippets ) OR ( dung java java snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung quang liu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets"))*.