Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoi » sach doi, sach moi, cach thoi
mach hoc » cach hoc, dich hoc, anh hoc
khoa dan » khoa dang, hoa dan, khoa can
dan nhan » danh nhan, dan chan, van nhan
nhan van » nhan dan, nhan va, phan van
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
ma khoa » may khoa, mai khoa, da khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach hoi) OR (mach hoc)) tap, nghien cuu mon hoc nganh khung hoc ma khoa dan nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach hoi) OR (mach hoc)) tap, nghien cuu mon hoc nganh khung hoc ma khoa dan nhan van".
• Adding a wildcard symbol may retrieve word variants: thu ((sach hoi) OR (mach hoc)) tap, nghien cuu mon hoc nganh khung hoc ma khoa dan nhan van*.