Perhaps you should try some spelling variations:
nhanh khoa » nhan khoa, nganh khoa, hang khoa
cach thoi » cac thoi, cach thuc, cach noi
hoc nhanh » hoc nganh, hoc phan
tuan pham » thanh pham, san pham, tac pham
sach hoi » sach doi, sach moi, hoach hoi
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
hai tuan » khai tuan, hai quan, hai tan
hoc ta » hoc tap, hoc tai, hoc tan
ta hai » tai hai, tac hai, tra hai

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 hoi) OR (cach thoi)) tap, nghien cuu dong hoc nhanh khoa hoc ta hai tuan pham van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach hoi) OR (cach thoi)) tap, nghien cuu dong hoc nhanh khoa hoc ta hai tuan pham van".
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) OR (cach thoi)) tap, nghien cuu dong hoc nhanh khoa hoc ta hai tuan pham van*.