Perhaps you should try some spelling variations:
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
van nhan » van phan, van thanh, danh nhan
nhan van » nhan dan, nhan va, phan van
so mach » so sach, tao mach, kon mach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van
va hoi » xa hoi, va hoc, va hoa

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

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