Perhaps you should try some spelling variations:
nghiem thuc » nghiem thuoc, nghiep thuc, nhiem thuc
doanh khoa » toan khoa
thuc cong » thuoc cong, thu cong, chuc cong
hoc doanh » hoa doanh, hoc danh, hoc dan
danh nhan » doanh nhan, thanh nhan, benh nhan
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
nhan va » nhan tai, nhan dan, nhan tao
ma hop » mau hop, ma hoa, va hop

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sach hoc) OR (sach hoi)) tap, nghiem thuc cong hoc doanh khoa hoc ma hop danh nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach hoc) OR (sach hoi)) tap, nghiem thuc cong hoc doanh khoa hoc ma hop danh nhan va".
• Adding a wildcard symbol may retrieve word variants: so ((sach hoc) OR (sach hoi)) tap, nghiem thuc cong hoc doanh khoa hoc ma hop danh nhan va*.