Perhaps you should try some spelling variations:
"duong dung code snippets" » "cuong dung code snippets", "dung dung code snippets", "duong dang code snippets", "duong dung cong snippets", "duong dung co snippets", "duong dung de snippets", "duong dung code slippers"
"danh cau code snippets" » "danh dau code snippets", "danh ca code snippets", "danh hau code snippets", "danh cau cong snippets", "danh cau de snippets", "danh cfd code snippets", "danh cau 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: (((("danh cau code snippets") or ("duong dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh cau code snippets") OR ("duong dung code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh cau code snippets ) or ( duong dung code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh cau code snippets") or ("duong dung code snippets"))) or ("locating bug code snippets"))*.