Perhaps you should try some spelling variations:
nhanh khung » nhanh hung, nhanh chuong, nhanh chong
khung hoc » chung hoc, nhung hoc, thuong hoc
hoc nhanh » hoc nganh, hoc phan
dong hoc » dong co, dong luc
cau nhan » chau nhan, ca nhan, cu nhan
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
sach hoc » cach hoc, mach hoc, sach duoc
hoi cau » hoi chu, hoc cau, hoa cau
dai hoi » dai hoc, dai hai, dai moi
hoc dai » hoc dan
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach hoc) or (sach hoi)) tap, nghien cuu dong hoc nhanh khung hoc dai hoi cau nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (sach hoi)) tap, nghien cuu dong hoc nhanh khung hoc dai hoi cau nhan va.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (sach hoi)) tap, nghien cuu dong hoc nhanh khung hoc dai hoi cau nhan va*.