Perhaps you should try some spelling variations:
"dong lucfd code snippets" » "dong luc code snippets", "dong cfd code snippets", "dong lucfd code slippers"
"huong dan code snippets" » "huong dan de snippets", "huong dan 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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dong lucfd code snippets") or ("huong dan code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong lucfd code snippets") OR ("huong dan code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong lucfd code snippets ) or ( huong dan code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong lucfd code snippets") or ("huong dan code snippets"))) or ("locating bug code snippets"))*.