Perhaps you should try some spelling variations:
"dung nhat dot snippets" » "dung nhan dot snippets", "dang nhat dot snippets", "dung nha dot snippets", "dung nhay dot snippets", "dung nhat so snippets"
"using c code snippets" » "using lc code snippets", "using a code snippets", "using _ code snippets", "using cfd code snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: "((((\"using c code snippets\") OR (\"dung nhat dot snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using c code snippets ) OR ( dung nhat dot snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using c code snippets") OR ("dung nhat dot snippets"))) OR ("locating bug code snippets"))*.