Perhaps you should try some spelling variations:
doanh khoa » toan khoa
nghien cua » nghien cuu, nghiep cua, nghiep vua
hanh thoi » hanh thuoc, nhanh thai, hanh noi
hoc doanh » hoa doanh, hoc danh, hoc dan
thu hanh » thuc hanh, thu thanh, thuy hanh
nhan dan » phan dau, gian dan
khoa hoc » hoa hoc
toan hoc » toan khoa, van hoc, hoa hoc
cua toan » cuu toan, xuan toan, cua 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 hanh thoi dai, nghien cua toan hoc doanh khoa hoc xa hai van ((nhan dan) OR (nhan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu hanh thoi dai, nghien cua toan hoc doanh khoa hoc xa hai van ((nhan dan) OR (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: thu hanh thoi dai, nghien cua toan hoc doanh khoa hoc xa hai van ((nhan dan) OR (nhan tai))*.