Perhaps you should try some spelling variations:
"dung dung lan snippets" » "duong dung lan snippets", "ung dung lan snippets", "dung ung lan snippets", "dung dung luan snippets", "dung dung land snippets", "dung dung lam snippets", "dung dung lan slippers"
"trinh cfd code snippets" » "trinh cad code snippets", "trinh co code snippets", "trinh cau code snippets", "trinh cfd code slippers", "trinh cfd core snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bug core snippets", "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 dung lan snippets") or ("trinh cfd code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung lan snippets") OR ("trinh cfd code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dung lan snippets ) or ( trinh cfd code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dung lan snippets") or ("trinh cfd code snippets"))) or ("locating bug code snippets"))*.