Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
giang day » gian dan
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
va giang » van giang, ha giang, va gian
hoc xa » hoc ma

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) OR (mach hoc)) tap, nghien cuu cong hoc nganh khoa hoc xa hoi va giang day~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach hoc) OR (mach hoc)) tap, nghien cuu cong hoc nganh khoa hoc xa hoi va giang day".
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) OR (mach hoc)) tap, nghien cuu cong hoc nganh khoa hoc xa hoi va giang day*.