Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
danh nhan » doanh nhan, thanh nhan, benh nhan
sach hoc » cach hoc, sach hoi, mach hoc
cong coc » cong cuoc, cong cac, cong co
coc hang » hoc hang, oc hang, moc hoang
thi danh » thai danh, thi hanh, thi anh
te sach » toc sach
nhan va » nhan tai, nhan dan, nhan tao
xa thi » xa thai, ha thi, ta thi

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 cua cong coc hang ((khoa hoc) OR (hoa hoc)) xa thi danh nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien cua cong coc hang ((khoa hoc) OR (hoa hoc)) xa thi danh nhan va".
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cua cong coc hang ((khoa hoc) OR (hoa hoc)) xa thi danh nhan va*.