Perhaps you should try some spelling variations:
kenh phan » benh nhan, benh phau, ke phan
cach hoc » cach thuc, cach thoi, dich hoc
hoc danh » hoc dan, hoc anh, hoc nganh
hoc hanh » hoc nhanh, hoc thanh, hoc anh
hoa kenh » hoa benh, hoa kinh, hoa khanh
phan dau » phan tu, hang dau
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 hoc tap, nhiem huu tung ((hoc danh) or (hoc hanh)) hoa hoc ma hoa kenh phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nhiem huu tung ((hoc danh) OR (hoc hanh)) hoa hoc ma hoa kenh phan dau.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nhiem huu tung ((hoc danh) or (hoc hanh)) hoa hoc ma hoa kenh phan dau*.