Perhaps you should try some spelling variations:
ngan khung » nganh khong, ngan hang, ngan dung
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoi » sach doi, cach thoi, hoach hoi
sach moi » sach doi, bach mai, sach bai
tinh luc » tinh duc, dinh luc, tinh khuc
luc ngan » luc nganh, luc nhan, luat ngan
nhan tao » nhan tai, nhan dan
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan

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 (sach moi)) tap, nghien cuu tinh luc ngan khung hoc mai hoi va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoi) OR (sach moi)) tap, nghien cuu tinh luc ngan khung hoc mai hoi va nhan tao.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) or (sach moi)) tap, nghien cuu tinh luc ngan khung hoc mai hoi va nhan tao*.