Perhaps you should try some spelling variations:
thanh tinh » thanh binh, nhanh tinh, than kinh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tinh cua » trinh cua, sinh cua, tinh chat
tam toan » tam than, pham toan, tam thanh
tap toan » tap doan, tap quan, bai toan
ho chuc » hoi chuc, hoc chuc, ho chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chuc nang - thanh tinh cua ((hang cong) or (dang cong)) ((tam toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chuc nang - thanh tinh cua ((hang cong) OR (dang cong)) ((tam toan) OR (tap toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chuc nang - thanh tinh cua ((hang cong) or (dang cong)) ((tam toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chuc nang - thanh tinh cua ((hang cong) or (dang cong)) ((tam toan) OR (tap toan)) cau*.