Perhaps you should try some spelling variations:
"dang dung code snippets" » "dan dung code snippets", "dang hung code snippets", "dang quang code snippets", "dang dung cong snippets", "dang dung co snippets", "dang dung de snippets", "dang dung code slippers"
"minh duc code snippets" » "minh duc cong snippets", "minh duc con snippets", "dinh duc code snippets", "minh duc code slippers"
"locating bug code 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: (((("minh duc code snippets") or ("dang dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("minh duc code snippets") OR ("dang dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( minh duc code snippets ) or ( dang dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("minh duc code snippets") or ("dang dung code snippets"))) or ("locating bug code snippets"))*.