Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
te sach » toc sach
nhan va » nhan dan, nhan tao, phan van
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: te sach hoc tap, nghien cuu dong hoc nganh khoa hoc xa hoi va ((nhan va) OR (nhan tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien cuu dong hoc nganh khoa hoc xa hoi va ((nhan va) OR (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cuu dong hoc nganh khoa hoc xa hoi va ((nhan va) OR (nhan tai))*.