Perhaps you should try some spelling variations:
tren nhanh » trien thanh, tien thanh, trien nhan
nhanh hung » thanh hung, nhanh hong, nhanh chuong
dong tren » dung tren, dong tien, dong truyen
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
hung hoc » chung hoc, khung hoc, nhung hoc
nhan tao » nhan tai, nhan dan
te sach » toc sach
hoi tap » hoi dap, hoc tap, hoi tai
nhan va » nhan tai, nhan dan, phan van
hoc xa » hoc ma

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

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