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"
"hang java java snippets" » "hang va java snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hang java java snippets") or ("dao cuong code snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("dao cuong code snippets"))) OR ("locating bug code slippers"))*.
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( dao cuong code snippets ))) or ( locating bug code slippers ))*.