Perhaps you should try some spelling variations:
"dung knnphang code snippets" » "dung khang code snippets", "dung knnpphang code snippets", "dung knnpnhang code snippets", "dung knnphanhg code snippets"
"locating bugs code snippets" » "locating bug code snippets"
"han 2 code slippers" » "phan 2 code slippers", "nhan 2 code slippers", "hanh 2 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: (((("han 2 code slippers") or ("dung knnphang code snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han 2 code slippers") OR ("dung knnphang code snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( han 2 code slippers ) or ( dung knnphang code snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han 2 code slippers") or ("dung knnphang code snippets"))) or ("locating bugs code snippets"))*.