Perhaps you should try some spelling variations:
"dong thanh code snippets" » "truong thanh code snippets", "dong thanh cong snippets", "dong thanh de snippets", "dong thanh code slippers"
"trinh cad code snippets" » "trinh cau code snippets", "trinh cac code snippets", "trinh cam code snippets", "trinh cfd code snippets", "trinh cad model snippets", "trinh cad 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: (((("trinh cad code snippets") or ("dong thanh code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh cad code snippets") OR ("dong thanh code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh cad code snippets ) or ( dong thanh code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh cad code snippets") or ("dong thanh code snippets"))) or ("locating bug code snippets"))*.