Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
doanh khoa » toan khoa
hoa doanh » toan doanh, hoa dan
cach thoi » cac thoi, cach thuc, cach noi
khoa hoc » hoa hoc
thoi dap » hoi dap, thoi dai, thi dap
cua dong » chua dong, cua cong, cua dang
dong hoa » dong hoc, dong co
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac
hoc cau » hoc cao, hoc cac, hoc can
nhan va » nhan tai, nhan tao, phan van
xa hoc » xa hoi, va hoc, xa hoa
hoc xa » hoc ma

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