Perhaps you should try some spelling variations:
"dung npnhang code snippets" » "dung nhan code snippets", "dung phan code snippets", "dung thang code snippets", "dung npnphang code snippets", "dung npnnhang code snippets", "dung npnhanhg code snippets", "dung npnhang core snippets", "dung npnhang code slippers"
"han 2 code snippets" » "phan 2 code snippets", "nhan 2 code snippets", "hanh 2 code snippets", "han 2 core snippets", "han 2 code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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 snippets") or ("dung npnhang code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han 2 code snippets") OR ("dung npnhang code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han 2 code snippets ) or ( dung npnhang code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han 2 code snippets") or ("dung npnhang code snippets"))) or ("locating bug code snippets"))*.