Perhaps you should try some spelling variations:
nhanh dong » hanh dong, nhanh chong, anh dong
dong thuoc » dung thuoc, dang thuoc, don thuoc
thanh toan » thanh hoa, thanh san, tinh toan
hoc nhanh » hoc nganh, hoc phan
thuoc dai » thuoc tai, thuoc dac, thuoc sai
dan thanh » dang thanh, danh thanh, ban thanh
hach hoc » cach hoc, hoach hoi, hoach hoa
mach hoc » cach hoc, dich hoc, anh hoc
dai hoi » dai hoc, dai hai, dai moi
hoi dan » hoa dan, hoc dan, hoi dap
mo hoc » mon hoc, co hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((hach hoc) or (mach hoc)) tap, nghien cuu mo hoc nhanh dong thuoc dai hoi dan thanh toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((hach hoc) OR (mach hoc)) tap, nghien cuu mo hoc nhanh dong thuoc dai hoi dan thanh toan.
• Adding a wildcard symbol may retrieve word variants: tu ((hach hoc) or (mach hoc)) tap, nghien cuu mo hoc nhanh dong thuoc dai hoi dan thanh toan*.