Perhaps you should try some spelling variations:
"toc mach hoc lam nguoi" » "toc mach hoc tay nguoi", "toc sach hoc lam nguoi", "hoc mac hoc lam nguoi", "tim mach hoc lam nguoi", "toc cach hoc lam nguoi", "toc dich hoc lam nguoi", "toc anh hoc lam nguoi", "toc mach duoc lam nguoi"
"tu cach thoi dao nguoi" » "tu cac thoi dao nguoi", "tu cach thuc dao nguoi", "tu cach noi dao nguoi", "tu cach thoi cho nguoi", "tu cach thoi dai nguoi", "tu cach thi dao nguoi", "tu cach thoi sao nguoi"
"ve hinh hoc dao nguoi" » "ve hinh hoc cho nguoi", "ve sinh hoc dao nguoi", "ve tin hoc dao nguoi", "ve benh hoc dao nguoi", "ve chinh hoc dao nguoi", "ve tinh hoc dao nguoi", "ve hinh hoc dan nguoi", "ve hinh hoc cao nguoi", "ve hinh hoc dai nguoi"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("toc mach hoc lam nguoi") or ((("tu cach thoi dao nguoi") or ("ve hinh hoc dao nguoi"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("toc mach hoc lam nguoi") OR ((("tu cach thoi dao nguoi") OR ("ve hinh hoc dao nguoi"))))*.
• Removing quotes may allow a broader search: (( toc mach hoc lam nguoi ) or ((( tu cach thoi dao nguoi ) or ( ve hinh hoc dao nguoi ))))*.