Perhaps you should try some spelling variations:
mach tinh » mach tich, manh tinh, trach tinh
don gian » dan gian
te mach » ke mach, tim mach, tao mach
tinh du » tinh duc, tinh dau, tich du
te sach » toc sach
kinh su » kinh suu, hinh su, tinh su
dinh su » dinh so, hinh su, dinh cu
so giao » so giai, hoc giao

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te mach tinh du - don gian ) or ( te sach ((kinh su) or (dinh su)) - so giao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te mach tinh du - don gian ) OR ( te sach ((kinh su) OR (dinh su)) - so giao )).
• Adding a wildcard symbol may retrieve word variants: (( te mach tinh du - don gian ) or ( te sach ((kinh su) or (dinh su)) - so giao ))*.