Perhaps you should try some spelling variations:
"dung cong code snippets" » "dung trong code snippets", "dung cong cong snippets", "dung cong co snippets", "dung cong che snippets", "dung cong code slippers"
"van anh code snippets" » "van anh co snippets", "van anh cong snippets", "van thanh code snippets", "van minh code snippets", "tuan anh code snippets", "van anh 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: (((("dung cong code snippets") or ("van anh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cong code snippets") OR ("van anh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung cong code snippets ) or ( van anh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung cong code snippets") or ("van anh code snippets"))) or ("locating bug code snippets"))*.