Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hop doanh » hop danh, hoa doanh, nhap doanh
cach hoc » cach thuc, cach thoi, dich hoc
cong hoc » dong hoc, cong hoa, cong coc
hoc danh » hoc dan, hoc anh, hoc hanh
so cach » so sach, co cach, loi cach
nhan va » nhan tai, nhan dan, nhan tao
ma hop » mau hop, ma hoa, va hop

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

• Performing a fuzzy search may retrieve terms with similar spellings: so cach hoc tap, nghien thu cong hoc danh ((khoa hoc) or (hoa hoc)) ma hop doanh nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so cach hoc tap, nghien thu cong hoc danh ((khoa hoc) OR (hoa hoc)) ma hop doanh nhan va.
• Adding a wildcard symbol may retrieve word variants: so cach hoc tap, nghien thu cong hoc danh ((khoa hoc) or (hoa hoc)) ma hop doanh nhan va*.