Perhaps you should try some spelling variations:
thuyet tinh » thuyet trinh, thuyet kinh, thuyet dinh
chinh doanh » kinh doanh
hoc thuyet » hoc chuyen
thong cong » trong cong, tong cong, thong thong
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
cong tang » cong thang, cong tan, cong lang
tang van » dang van, hoang van, trong van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet tinh - chinh doanh cua thong cong tang van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet tinh - chinh doanh cua thong cong tang van ban*.