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 lai » hoc dai, hoc bai, hoc lam
lai hoi » dai hoi, lai hoa, lai roi
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 lai hoi va nhan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach hoi) OR (sach moi)) tap, nghien cuu tinh luc ngan khung hoc lai 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 lai hoi va nhan tao*.