Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
thanh nhan » thanh phan, thanh san, thanh toan
hoc nganh » hoc nhanh
hoc thanh » hoc nhanh, hoan thanh, hoc phan
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
nhan va » nhan tai, nhan dan, nhan tao
ma hoc » va hoc, ma hoa, mo hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: bo ((sach hoc) OR (mach hoc)) tap, nghien cuu cong hoc nganh khoa hoc ma hoc thanh nhan va~.
• Adding a wildcard symbol may retrieve word variants: bo ((sach hoc) or (mach hoc)) tap, nghien cuu cong hoc nganh khoa hoc ma hoc thanh nhan va*.