Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
cac thoi » cac toi, cac hop, cac tro
thoi dap » hoi dap, thoi dai, thi dap
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
nha van » nha lanh
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac thoi dap, nghien cuu cong hoc doanh khoa hoc xa hoc cao ((nha van) or (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thoi dap, nghien cuu cong hoc doanh khoa hoc xa hoc cao ((nha van) OR (nhan va)).
• Adding a wildcard symbol may retrieve word variants: tu cac thoi dap, nghien cuu cong hoc doanh khoa hoc xa hoc cao ((nha van) or (nhan va))*.