Perhaps you should try some spelling variations:
hoa nhanh » hoc nhanh, hoa thanh, hoa khanh
danh nhan » doanh nhan, thanh nhan, benh nhan
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
so sach » so sanh, bo sach, co sach
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 sach hoc tap, nghien cuu cong hoa nhanh ((khoa hoc) or (hoa hoc)) ma hop danh nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu cong hoa nhanh ((khoa hoc) OR (hoa hoc)) ma hop danh nhan va.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu cong hoa nhanh ((khoa hoc) or (hoa hoc)) ma hop danh nhan va*.