Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nhanh khoa » nhan khoa, nganh khoa, hang khoa
coc nhanh » hoc nhanh, doc nhanh, cach nhanh
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong coc » cong cuoc, cong cac, cong co
khoa hoc » hoa hoc
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
nhan va » nhan tai, nhan dan, phan van
hoc xa » hoc ma
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 hoc tap, nghien cac cong coc nhanh khoa hoc xa hoi ca ((nhan va) OR (nhan tao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cac cong coc nhanh khoa hoc xa hoi ca ((nhan va) OR (nhan tao))".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cac cong coc nhanh khoa hoc xa hoi ca ((nhan va) OR (nhan tao))*.