Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoa doanh » toan doanh, hoa dan
toan phan » thanh phan, toan ban, hoa phan
thu canh » thuc hanh, thu cong, thu ban
canh hoc » anh hoc, cach hoc, danh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
khoa hoc » hoa hoc
van toan » van tuan, van tan, van thanh
xa thai » ca thai, a thai, xa hai
da thai » dao thai, do thai, ca thai

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 hoc tap, nghien cuu cong hoa doanh khoa hoc ((xa thai) OR (da thai)) van toan phan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu canh hoc tap, nghien cuu cong hoa doanh khoa hoc ((xa thai) OR (da thai)) van toan phan".
• Adding a wildcard symbol may retrieve word variants: thu canh hoc tap, nghien cuu cong hoa doanh khoa hoc ((xa thai) OR (da thai)) van toan phan*.