Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc doanh » hoa doanh, hoc danh, hoc dan
thoi dap » hoi dap, thoi dai, thi dap
van nhan » van phan, van thanh, danh nhan
nhan tao » nhan tai, nhan dan
tu cach » tu cac
hoi van » hoi va, hoi dan, hai van
cuu co » huu co, cua co, cuu mo

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 dap, nghien cuu co hoc doanh ((khoa hoc) or (hoa hoc)) xa hoi van nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi dap, nghien cuu co hoc doanh ((khoa hoc) OR (hoa hoc)) xa hoi van nhan tao.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi dap, nghien cuu co hoc doanh ((khoa hoc) or (hoa hoc)) xa hoi van nhan tao*.