Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van
nhan va » nhan tai, nhan dan, nhan tao
ma hoi » mai hoi, xa hoi, ma hoa

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