Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nganh khong » nganh cong, nganh nong, nganh khoa
benh hoc » sinh hoc
gian dan » gian lang
tu benh » tru benh, thu benh, tuy benh
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va gian » va gianh, van gian, va giai
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 benh hoc tap, nghien cuu mon hoc ((nganh khong) or (nhanh chong)) hoc ma hoi va gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu benh hoc tap, nghien cuu mon hoc ((nganh khong) OR (nhanh chong)) hoc ma hoi va gian dan.
• Adding a wildcard symbol may retrieve word variants: tu benh hoc tap, nghien cuu mon hoc ((nganh khong) or (nhanh chong)) hoc ma hoi va gian dan*.