Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nganh khoa » nganh hoa, doanh khoa, anh khoa
sach hoi » sach doi, sach moi, cach thoi
lang dau » hang dau, xang dau, nang dau
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va lang » va nang, hoa lang
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 hoi tap, nghien cuu mon hoc ((nganh khoa) OR (nganh khong)) hoc xa hoi va lang dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi tap, nghien cuu mon hoc ((nganh khoa) OR (nganh khong)) hoc xa hoi va lang dau".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien cuu mon hoc ((nganh khoa) OR (nganh khong)) hoc xa hoi va lang dau*.