Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cach thoi » cac thoi, cach thuc, cach noi
hoc doanh » hoa doanh, hoc danh, hoc dan
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
phan van » pham van, thanh van, luan van
tu cach » tu cac
hoi cau » hoi chu, hoc cau, hoa cau
nhan va » nhan tai, nhan dan, nhan tao
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 cuu cong hoc doanh khoa hoc xa hoi cau ((phan van) or (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi dap, nghien cuu cong hoc doanh khoa hoc xa hoi cau ((phan van) OR (nhan va)).
• Adding a wildcard symbol may retrieve word variants: tu cach thoi dap, nghien cuu cong hoc doanh khoa hoc xa hoi cau ((phan van) or (nhan va))*.