Perhaps you should try some spelling variations:
nghien thieu » nghiep hieu, nghiep tieu, nguyen thien
nganh khoa » nganh hoa, nganh khong, doanh khoa
thieu mot » hieu mot, thieu so, hieu moi
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
hang tai » hang va, dung tai
su sach » so sach, vu sach
hoi tap » hoc tap, hoi tai, hai tap
mot hoc » mon hoc, mo hoc, mot goc
va hang » van hang, va nang, va 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: su sach ((hoi tap) OR (hoi dap)), nghien thieu mot hoc nganh khoa hoc xa hoi va hang tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((hoi tap) OR (hoi dap)), nghien thieu mot hoc nganh khoa hoc xa hoi va hang tai".
• Adding a wildcard symbol may retrieve word variants: su sach ((hoi tap) OR (hoi dap)), nghien thieu mot hoc nganh khoa hoc xa hoi va hang tai*.