Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien sach » dien sach, kien sach, thien hach
hanh manh » hanh mang, lanh manh, hoang manh
cua nhung » va nhung
hach toan » thanh toan, manh toan
manh cua » doanh cua, ban cua
tac toan » tap toan, tam toan, tich toan

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 manh cua nhung cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sach - hanh manh cua nhung cong ((tac toan) OR (hach toan)) cau*.