Perhaps you should try some spelling variations:
"trinh cong code slippers" » "trinh dung code slippers", "trinh cong cong slippers", "trinh cong co slippers", "trinh cong che slippers"
"huong dan code snippets" » "huong dan de 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.

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