Perhaps you should try some spelling variations:
"dong huong code snippets" » "dong huong co snippets", "dong huong com snippets", "dong thuong code snippets", "dong duong code snippets", "cong huong code snippets", "dong huong code slippers"
"tran doan code snippets" » "trang doan code snippets", "tan doan code snippets", "tran hoan code snippets", "tran doan 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: (((("tran doan code snippets") or ("dong huong code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran doan code snippets") OR ("dong huong code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran doan code snippets ) or ( dong huong code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran doan code snippets") or ("dong huong code snippets"))) or ("locating bug code snippets"))*.