Perhaps you should try some spelling variations:
nganh chong » nganh cong, nhanh chong, nganh khong
hoc nganh » hoc nhanh
chong hoc » chung hoc, chong doc, thong hoc
sach hoc » cach hoc, sach hoi, mach hoc
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
hoc mai » hoc ma, hoc dai, hoc bai
mai hoc » dai hoc, bai hoc, mi hoc
hoc cac » hoc cao
nhan va » nhan tai, nhan dan, phan van
mo hoc » mon hoc, co hoc

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 mo hoc nganh chong hoc mai hoc cac ((nhan va) or (nhan tao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu mo hoc nganh chong hoc mai hoc cac ((nhan va) OR (nhan tao)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mo hoc nganh chong hoc mai hoc cac ((nhan va) or (nhan tao))*.