Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
hoc phan » hoc dan, hoc pho
may nhan » may nha, day nhanh, may khoan
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
hoa may » hoc may

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 ((hoc nganh) or (hoc phan)) khong hoc ma hoa may nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu cong ((hoc nganh) OR (hoc phan)) khong hoc ma hoa may nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu cong ((hoc nganh) or (hoc phan)) khong hoc ma hoa may nhan tai*.