Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
nghiep va » nghiep vu
hoc nganh » hoc nhanh
nhan tao » nhan tai, nhan dan
cach hoc » cach thuc, cach thoi, dich hoc
khoa hoc » hoa hoc
cong hoc » dong hoc, cong hoa, cong coc
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi dan » hoa dan, hoc dan, hoi dap
va cong » tai cong, cua cong
nhan va » nhan tai, nhan dan, phan van
tu cach » tu cac

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 hoc tap, nghiep va cong hoc nganh khoa hoc mai hoi dan ((nhan va) or (nhan tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghiep va cong hoc nganh khoa hoc mai hoi dan ((nhan va) OR (nhan tao)).
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghiep va cong hoc nganh khoa hoc mai hoi dan ((nhan va) or (nhan tao))*.