Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh hoa » thanh pho
thoi tap » toi tap, hoc tap, thoi dai
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
hoa benh » khoa benh, hoa binh, hoc benh
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac

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 cuu dong hoc thanh hoa hoc ma hoa benh ((nhan dan) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu dong hoc thanh hoa hoc ma hoa benh ((nhan dan) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu dong hoc thanh hoa hoc ma hoa benh ((nhan dan) or (phan tu))*.