Perhaps you should try some spelling variations:
ngan khong » nganh khong, nhan khong, ngan hang
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoi » sach moi, cach thoi, hoach hoi
sach doi » sach moi, sach dao, sach bai
cuu tong » cuu cong, cuu tinh, huu tung
tong luc » dong luc, tong cuc, truong luc
luc ngan » luc nganh, luc nhan, luat ngan
nhan tao » nhan tai, nhan dan
ma hoi » mai hoi, xa hoi, ma hoa
hoi ca » hoi cua, hoi cac, hoi cau

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 doi)) tap, nghien cuu tong luc ngan khong hoc ma hoi ca nhan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach hoi) OR (sach doi)) tap, nghien cuu tong luc ngan khong hoc ma hoi ca nhan tao".
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) OR (sach doi)) tap, nghien cuu tong luc ngan khong hoc ma hoi ca nhan tao*.