Perhaps you should try some spelling variations:
thuoc mach » thuoc sach, thuong mach, thuoc ma
doanh khoa » toan khoa
soc doanh » so doanh, hoa doanh, voi doanh
thanh van » thanh toan, thanh phan, thanh nhan
mach hoc » cach hoc, dich hoc, anh hoc
cuu long » cuu cong, cuu tong, cuu nang
long soc » lon soc, luong suc, cong so
khoa hoc » hoa hoc
thi van » thi lan, thi hanh, thi nang
hoc ha » hoc hoa, hoc hai, hoc hat
ha thi » pham thi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc mach hoc tap, nghien cuu long soc doanh khoa hoc ha thi van ((thanh van) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc mach hoc tap, nghien cuu long soc doanh khoa hoc ha thi van ((thanh van) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: thuoc mach hoc tap, nghien cuu long soc doanh khoa hoc ha thi van ((thanh van) or (thanh san))*.