Perhaps you should try some spelling variations:
nganh khoa » nganh khong, doanh khoa, anh khoa
nganh hoa » thanh hoa, khanh hoa, danh hoa
benh toan » benh tan, benh than, tinh toan
thu cach » thuc cach, thu canh, tu cach
cach noi » cach thoi, hanh noi, anh noi
cuu toan » cuu hoan, cua toan, huu toan
toan hoc » toan khoa, van hoc, hoa hoc
hap benh » hop benh, kham benh, phau benh
toan tai » toan tap, doanh tai, toan ban
noi dap » hoi dap, noi da, doi dap
hoc xa » hoc ma
xa hap » xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu cach noi dap, nghien cuu toan hoc ((nganh khoa) or (nganh hoa)) hoc xa hap benh toan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cach noi dap, nghien cuu toan hoc ((nganh khoa) OR (nganh hoa)) hoc xa hap benh toan tai.
• Adding a wildcard symbol may retrieve word variants: thu cach noi dap, nghien cuu toan hoc ((nganh khoa) or (nganh hoa)) hoc xa hap benh toan tai*.