Perhaps you should try some spelling variations:
nang khong » hang khong, nang thuong, nganh khong
tinh chuc » dinh chuc, minh chuc, tinh chua
khong hoc » khung hoc, thong hoc, khong thuoc
thu sach » tu sach, thuat sach, thuoc sach
nhan tao » nhan tai, nhan dan
su sach » so sach, vu sach
va nhan » van nhan, ca nhan, va phan
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (su sach)) hoc tap, nghien cuu tinh chuc nang khong hoc ma hoa va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (su sach)) hoc tap, nghien cuu tinh chuc nang khong hoc ma hoa va nhan tao.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (su sach)) hoc tap, nghien cuu tinh chuc nang khong hoc ma hoa va nhan tao*.