Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hanh thoi » hanh thuoc, nhanh thai, hanh noi
thoi dap » hoi dap, thoi dai, thi dap
toan hoc » toan khoa, van hoc, tin hoc
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai
thuc » thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuc hanh thoi dap, nghien cuu ((toan hoc) or (hoa hoc)) nganh khoa hoc ma hai van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuc hanh thoi dap, nghien cuu ((toan hoc) OR (hoa hoc)) nganh khoa hoc ma hai van nhan dan.
• Adding a wildcard symbol may retrieve word variants: thuc hanh thoi dap, nghien cuu ((toan hoc) or (hoa hoc)) nganh khoa hoc ma hai van nhan dan*.