Perhaps you should try some spelling variations:
sach thuong » mach thuong, sach huong, anh thuong
thuong tap » thuong gap, thuong thay, thuong mai
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
phan dang » phan dau, phan cong, nhan dan
khoa hoc » hoa hoc
phan dan » phan dau, nhan dan, phan van
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc xa » hoc ma

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 thuong tap, nghien cuu mon hoc nganh khoa hoc xa hoi va ((phan dan) OR (phan dang))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thuong tap, nghien cuu mon hoc nganh khoa hoc xa hoi va ((phan dan) OR (phan dang))".
• Adding a wildcard symbol may retrieve word variants: tu sach thuong tap, nghien cuu mon hoc nganh khoa hoc xa hoi va ((phan dan) OR (phan dang))*.