Perhaps you should try some spelling variations:
dang thong » dang thuong, dong thong, mang thong
thong dung » thong cong, thong thuong
hien sach » dien sach, kien sach, thien hach
hanh dang » hanh dong, anh dang, hanh dung
dung cong » dung trong
bang khan » bang nhan, bang thanh, dang khanh
ban hanh » ban hang

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 - hanh dang thong dung cong ((bang khan) or (ban hanh)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh dang thong dung cong ((bang khan) OR (ban hanh)) cap*.