Perhaps you should try some spelling variations:
nghiem thuc » nghiem thuoc, nghiep thuc, nhiem thuc
doanh khoa » toan khoa
thanh van » thanh toan, thanh phan, thanh nhan
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cong hoa » dong hoa, dong hoc, hang hoa
khoa hoc » hoa hoc
xa thanh » va thanh, ha thanh, ta thanh
cong so » cong san
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: thu sach hoc tap, nghiem thuc ((cong so) or (cong hoa)) doanh khoa hoc xa thanh van thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghiem thuc ((cong so) OR (cong hoa)) doanh khoa hoc xa thanh van thanh san.
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghiem thuc ((cong so) or (cong hoa)) doanh khoa hoc xa thanh van thanh san*.