Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tan
doi tai » hoi tai, dai tai, doi tac
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
nhan va » nhan tai, nhan dan, nhan tao
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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