Perhaps you should try some spelling variations:
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc nganh » hoc nhanh
anh hoc » sinh hoc, benh hoc, hinh hoc
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao
so anh » so sanh, so danh, do anh
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 anh hoc tap, nghien cuu mon hoc nganh ((cong thuoc) or (dung thuoc)) va hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so anh hoc tap, nghien cuu mon hoc nganh ((cong thuoc) OR (dung thuoc)) va hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: so anh hoc tap, nghien cuu mon hoc nganh ((cong thuoc) or (dung thuoc)) va hoi va nhan va*.