Perhaps you should try some spelling variations:
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
phan dau » phan tu, hang dau
sach dao » lanh dao
khoa hoc » hoa hoc
mon hoc » toan hoc, dong hoc
cuu mon » cuu mo, cuu mot, cuu cong
dao tap » dao tao, dao tay, dao gap
loi roi » loi noi, lai roi, voi roi
dai hoa » dai khoa, dai hoc, dai hoi
va phan » van phan, va phat, va phap
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach dao tap, nghien cuu mon hoc doanh khoa hoc ((loi roi) or (dai hoa)) va phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach dao tap, nghien cuu mon hoc doanh khoa hoc ((loi roi) OR (dai hoa)) va phan dau.
• Adding a wildcard symbol may retrieve word variants: te sach dao tap, nghien cuu mon hoc doanh khoa hoc ((loi roi) or (dai hoa)) va phan dau*.