Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
phan dau » phan tu, hang dau
te sach » toc sach
sach do » sach dao, sach doi, sach de
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ca phan » cac phan, cao phan, cap phan
do dap » doi dap, do dai, do dac
ma hoi » mai hoi, ma hoa, me hoi

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach do dap, nghien cuu mon hoc nganh khoa hoc ((ma hoi) OR (xa hoi)) ca phan dau~".
• Adding a wildcard symbol may retrieve word variants: te sach do dap, nghien cuu mon hoc nganh khoa hoc ((ma hoi) OR (xa hoi)) ca phan dau*.