Perhaps you should try some spelling variations:
hoa doanh » toan doanh, hoa dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu hang » cuu khang, cua hang, cuu hanh
cuu nang » chuc nang, cam nang, cuu van
nhan tao » nhan tai, nhan dan
su sach » so sach, vu sach
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoc tap, nghien ((cuu hang) or (cuu nang)) hoa doanh hoa hoc xa hoi va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien ((cuu hang) OR (cuu nang)) hoa doanh hoa hoc xa hoi va nhan tao.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien ((cuu hang) or (cuu nang)) hoa doanh hoa hoc xa hoi va nhan tao*.