Perhaps you should try some spelling variations:
dong thuong » cong thuong, dong thong, dung thuong
nghien cua » nghien cuu, nghiep cua, nghiep vua
nhanh dong » hanh dong, nhanh chong, anh dong
hoc nhanh » hoc nganh, hoc phan
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, bac hoc
anh hoc » sinh hoc, benh hoc, hinh hoc
cua hoa » cua khoa, cua hoi, cua hoc
mai hoc » dai hoc, bai hoc, mi hoc
hoc van » hoc dan, hoc va, hoc vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((mach hoc) or (anh hoc)) tap, nghien cua hoa hoc nhanh dong thuong mai hoc van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((mach hoc) OR (anh hoc)) tap, nghien cua hoa hoc nhanh dong thuong mai hoc van thanh van.
• Adding a wildcard symbol may retrieve word variants: thu ((mach hoc) or (anh hoc)) tap, nghien cua hoa hoc nhanh dong thuong mai hoc van thanh van*.