Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
cac nhan » ca nhan, cac nha, cam nhan
cac thu » cach thuc, cac thoi
thu tap » thu thap, thuc tap, thu tai
hoc cac » hoc cao
nhan va » nhan tai, nhan dan, nhan tao
mo hoc » mon hoc, co hoc

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 thu tap, nghien cuu mo hoc doanh khoa ((hoc xa) or (hoc ma)) hoc cac nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thu tap, nghien cuu mo hoc doanh khoa ((hoc xa) OR (hoc ma)) hoc cac nhan va.
• Adding a wildcard symbol may retrieve word variants: tu cac thu tap, nghien cuu mo hoc doanh khoa ((hoc xa) or (hoc ma)) hoc cac nhan va*.