Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nghien huu » nghien cuu, nguyen huu, nhiem huu
nhan khong » nhan thong, nhanh chong, nganh khong
toan nhoc » toan hoc, thang nhoc, toan khoa
nhoc nhan » ngoc nhan, hoc nhan, nhac nhan
thuoc mai » thuoc ma, thuoc tai, thuoc moi
dich hoc » sinh hoc, hinh hoc, tinh hoc
huu toan » huu tuan, cuu toan, huy toan
nhan dan » phan dau, gian dan, nhan tai
anh hoc » sinh hoc, benh hoc, hinh hoc
mai hoi » mai khoi, dai hoi, lai hoi
cu nhan » ca nhan
hoi cu » hoi chu, hoi cua, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((dich hoc) or (anh hoc)) tap, nghien huu toan nhoc nhan khong thuoc mai hoi cu nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((dich hoc) OR (anh hoc)) tap, nghien huu toan nhoc nhan khong thuoc mai hoi cu nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((dich hoc) or (anh hoc)) tap, nghien huu toan nhoc nhan khong thuoc mai hoi cu nhan dan*.