Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach noi
cach thuc » anh thuc, cac thu
nhan khoa » nha khoa, khuan khoa, toan khoa
danh nhan » doanh nhan, thanh nhan, benh nhan
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
khoa hoc » hoa hoc
ha danh » han danh, hoa danh, ha anh
nhan va » nhan tai, nhan dan, nhan tao
ma ha » ma hoa, mai ha, my ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((cach thoi) or (cach thuc)) tap, nghien cuu tong hoc nhan khoa hoc ma ha danh nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((cach thoi) OR (cach thuc)) tap, nghien cuu tong hoc nhan khoa hoc ma ha danh nhan va.
• Adding a wildcard symbol may retrieve word variants: te ((cach thoi) or (cach thuc)) tap, nghien cuu tong hoc nhan khoa hoc ma ha danh nhan va*.