Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
thoi tap » toi tap, hoc tap, thoi dai
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
vu cach » va cach, ve cach, vu bach
hoi van » hoi va, hoi dan, hai van
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu cach ((thoi tap) or (hoi dap)), nghien cuu cong hoc doanh khoa hoc ma hoi van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu cach ((thoi tap) OR (hoi dap)), nghien cuu cong hoc doanh khoa hoc ma hoi van thanh van.
• Adding a wildcard symbol may retrieve word variants: vu cach ((thoi tap) or (hoi dap)), nghien cuu cong hoc doanh khoa hoc ma hoi van thanh van*.