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
danh nhan » doanh nhan, thanh nhan, benh nhan
nhan dan » phan dau, gian dan, nhan tai
lai danh » lai doanh, loai danh, dai danh
khoa hoc » hoa hoc
cong hoc » dong hoc, cong hoa, cong coc
cac cong » cua cong
hoc lua » hoc luan, hoc luat, hoc cua
lua lai » mua lai, lua rai, luat lao
bo sach » co sach, hoc sach
bo cach » bo canh, co cach, loi cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((bo cach) OR (bo sach)) hoc tap, nghien cac cong hoc nganh khoa hoc lua lai danh nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((bo cach) OR (bo sach)) hoc tap, nghien cac cong hoc nganh khoa hoc lua lai danh nhan dan".
• Adding a wildcard symbol may retrieve word variants: ((bo cach) OR (bo sach)) hoc tap, nghien cac cong hoc nganh khoa hoc lua lai danh nhan dan*.