Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
danh nhan » doanh nhan, thanh nhan, benh nhan
nhan dan » phan dau, gian dan, nhan tai
hai danh » thai danh, hai anh, hai dang
khoa hoc » hoa hoc
dong hoc » dong co, dong luc
mach hoc » cach hoc, anh hoc, bac hoc
cac dong » cac duong, cac cong, cac dang
dich hoc » sinh hoc, hinh hoc, tinh hoc
hoc lua » hoc luan, hoc luat, hoc cua
lua hai » qua hai, cua hai, lua lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo ((mach hoc) OR (dich hoc)) tap, nghien cac dong hoc nganh khoa hoc lua hai danh nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo ((mach hoc) OR (dich hoc)) tap, nghien cac dong hoc nganh khoa hoc lua hai danh nhan dan".
• Adding a wildcard symbol may retrieve word variants: bo ((mach hoc) OR (dich hoc)) tap, nghien cac dong hoc nganh khoa hoc lua hai danh nhan dan*.