Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
anh hoc » sinh hoc, benh hoc, hinh hoc
hoi cau » hoi chu, hoc cau, hoa cau
tu anh » tu hanh, tu manh, thu anh
hoc xa » hoc ma
hoi cu » hoi chu, hoi cua, hoi co

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu anh hoc tap, nghien cac cong hoc nganh khoa hoc xa ((hoi cu) OR (hoi cau)) nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu anh hoc tap, nghien cac cong hoc nganh khoa hoc xa ((hoi cu) OR (hoi cau)) nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu anh hoc tap, nghien cac cong hoc nganh khoa hoc xa ((hoi cu) OR (hoi cau)) nhan dan*.