Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
sach de » cach de, sach dao, sach dat
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc cau » hoc cao, hoc cac, hoc can
de dac » de dao, de dat, le dac
hoi ca » hoi cua, hoi cac, hoi cau

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: te sach de dac, nghien cuu mon hoc nganh khoa hoc ma ((hoi ca) OR (hoc cau)) nhan dan~.
• Adding a wildcard symbol may retrieve word variants: te sach de dac, nghien cuu mon hoc nganh khoa hoc ma ((hoi ca) or (hoc cau)) nhan dan*.