Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
luc nganh » luc ngan, chuc nganh, luat nganh
cuu cong » cua cong, thu cong, cac cong
cong luc » dong luc, cong suc, cong duc
thuoc ma » hoc ma, duoc ma
nhan tao » nhan tai, nhan dan
tu cach » tu cac
su sach » so sach, vu sach
va nhan » van nhan, ca nhan, va phan
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) hoc tap, nghien cuu cong luc nganh cong thuoc ma hoi va nhan tao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) hoc tap, nghien cuu cong luc nganh cong thuoc ma hoi va nhan tao.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) hoc tap, nghien cuu cong luc nganh cong thuoc ma hoi va nhan tao*.