Perhaps you should try some spelling variations:
mach dich » mach tich, mach dien, mai dich
cach tinh » cac tinh, canh tinh, cach kinh
tinh duc » minh duc, dinh duc, ninh duc
don gian » dan gian
tu mach » tu manh, tu hach, tu sach
dich du » dich vu, tich du, dinh du
tu cach » tu cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu mach dich du - hoc cao ) or ( tu cach tinh duc - don gian ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu mach dich du - hoc cao ) OR ( tu cach tinh duc - don gian )).
• Adding a wildcard symbol may retrieve word variants: (( tu mach dich du - hoc cao ) or ( tu cach tinh duc - don gian ))*.