Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang cong » dang cong, hang nong, bang cong
hach toan » thanh toan, manh toan
tung cua » trung cua, tuong cua, dung cua
cua hang » cua dang, cua nhung, cua cong
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: ho ((hieu manh) or (chieu sach)) - thanh tung cua hang cong ((tac toan) OR (hach toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - thanh tung cua hang cong ((tac toan) OR (hach toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - thanh tung cua hang cong ((tac toan) OR (hach toan)) tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - thanh tung cua hang cong ((tac toan) OR (hach toan)) tap*.