Perhaps you should try some spelling variations:
doanh khoa » toan khoa
canh thoi » cach thoi, hanh thoi, anh tho
hoc doanh » hoa doanh, hoc danh, hoc dan
thu canh » thuc hanh, thu cong, thu ban
van nhan » van phan, van thanh, danh nhan
khoa hoc » hoa hoc
cuu hoan » luu hoang, cuu van, cuu khoa
cuu toan » cua toan, huu toan, cuu thanh
thoi dai » hoc dai, hoi dap, hoi dan
nhan tai » hang tai, van tai, toan tai
hai van » thai van, ha van, hai tan
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: thu canh thoi dai, nghien ((cuu toan) or (cuu hoan)) hoc doanh khoa hoc xa hai van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu canh thoi dai, nghien ((cuu toan) OR (cuu hoan)) hoc doanh khoa hoc xa hai van nhan tai.
• Adding a wildcard symbol may retrieve word variants: thu canh thoi dai, nghien ((cuu toan) or (cuu hoan)) hoc doanh khoa hoc xa hai van nhan tai*.