Perhaps you should try some spelling variations:
nganh dong » nganh cong, nhanh dong, nganh nong
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nganh » hoc nhanh
kon mach » ke mach, ban mach
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
nhan tai » hang tai, van tai, toan tai
va hoi » xa hoi, va hoa
va hoc » van hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: kon mach hoc tap, nghien cuu cong hoc nganh dong thuoc ((va hoi) or (va hoc)) ca nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: kon mach hoc tap, nghien cuu cong hoc nganh dong thuoc ((va hoi) OR (va hoc)) ca nhan tai.
• Adding a wildcard symbol may retrieve word variants: kon mach hoc tap, nghien cuu cong hoc nganh dong thuoc ((va hoi) or (va hoc)) ca nhan tai*.