Perhaps you should try some spelling variations:
"dao cuong code snippets" » "dao cuong cong snippets", "dai cuong code snippets", "doan cuong code snippets", "cao cong code snippets", "dao cuong code slippers"
"trong cac code snippets" » "trong cac cong snippets", "trong cac co snippets", "trong cac che snippets", "trong cac code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: "((((\"dao cuong code snippets\") OR (\"trong cac code snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dao cuong code snippets ) OR ( trong cac code snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dao cuong code snippets") OR ("trong cac code snippets"))) OR ("locating bug code snippets"))*.