Perhaps you should try some spelling variations:
chuc nganh » chuc nang, hoc nganh, cac nganh
nganh khoa » nganh hoa, nganh khong, doanh khoa
cong chuc » cong thuc, cong cu, cong cua
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
khoa hoc » hoa hoc
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
hoi van » hoi va, hoi dan, hai van
nhan va » nhan tai, nhan dan, phan van
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 sach hoc tap, nghien cuu cong chuc nganh khoa hoc ma hoi van ((nhan va) OR (nhan tao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu cong chuc nganh khoa hoc ma hoi van ((nhan va) OR (nhan tao))".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu cong chuc nganh khoa hoc ma hoi van ((nhan va) OR (nhan tao))*.