Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
khung hoc » nhung hoc, thuong hoc, trung hoc
chung hoc » trung hoc, dung hoc, hung hoa
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
tu mach » tu cach, tu manh, tu hach
hoi ca » hoi cua, hoi cac, hoi cau

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: "tu mach hoc tap, nghien cuu khoa hoc nganh ((khung hoc) OR (chung hoc)) xa hoi ca nhan dan~".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu khoa hoc nganh ((khung hoc) OR (chung hoc)) xa hoi ca nhan dan*.