Perhaps you should try some spelling variations:
nhanh khang » nhanh thang, nhanh quang, nhanh thanh
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
nghien huy » nghien cuu, nguyen huy, nghiep quy
hoc nhanh » hoc nganh, hoc phan
thuoc lai » thuoc tai, thuoc la, thuoc sai
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
huy khoa » chua khoa, cuu khoa, hoc khoa
khoa hoc » hoa hoc
nhan van » nhan dan, nhan va, phan van
lai hoi » dai hoi, lai hoa, lai roi
hoi ca » hoi cua, hoi cac, 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 ((mach hoc) or (cach hoc)) tap, nghien huy khoa hoc nhanh khang thuoc lai hoi ca nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((mach hoc) OR (cach hoc)) tap, nghien huy khoa hoc nhanh khang thuoc lai hoi ca nhan van.
• Adding a wildcard symbol may retrieve word variants: tu ((mach hoc) or (cach hoc)) tap, nghien huy khoa hoc nhanh khang thuoc lai hoi ca nhan van*.