Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thong cong » trong cong, tong cong, thong thong
hien sach » dien sach, kien sach, thien hach
doanh cua » doanh luan
cua thong » cua thuong, cua khong, cua tong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sach - doanh doanh cua thong cong ((dan than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - doanh doanh cua thong cong ((dan than) OR (dan chan)) cao*.