Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach nuoc » sach duoc, cac nuoc, bach tuoc
hoc nganh » hoc nhanh
dich hoc » sinh hoc, hinh hoc, tinh hoc
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach nuoc) or (dich hoc)) tap, nghien cuu mon hoc nganh khoa hoc mai hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach nuoc) OR (dich hoc)) tap, nghien cuu mon hoc nganh khoa hoc mai hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((sach nuoc) or (dich hoc)) tap, nghien cuu mon hoc nganh khoa hoc mai hoi va nhan dan*.