Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
doanh khoa » toan khoa
cach thoi » cac thoi, cach thuc, cach noi
khanh hoa » thanh hoa, hang hoa
danh nhan » doanh nhan, thanh nhan, benh nhan
thoi tap » toi tap, hoc tap, thoi dai
hoi danh » hop danh, hoi dan, hoc danh
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thoi tap, nghien huu mot hoc ((doanh khoa) or (khanh hoa)) hoc ma hoi danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien huu mot hoc ((doanh khoa) OR (khanh hoa)) hoc ma hoi danh nhan dan*.