Perhaps you should try some spelling variations:
doanh khoa » toan khoa
cach thoi » cac thoi, cach noi
cach thuc » anh thuc, cac thu
hoc doanh » hoa doanh, hoc danh, hoc dan
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
hai van » thai van, ha van, hai tan
nhan va » nhan tai, nhan dan, nhan tao
cuu co » huu co, cua co, cuu mo
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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