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