Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
manh dung » manh hung, manh tung, anh dung
dung cong » dung trong
hinh toan » tinh toan, thanh toan, trinh toan
dung cua » dung luan, dung cho
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu manh) or (chieu xanh)) - manh dung cua dung cong ((hinh toan) or (thanh san)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - manh dung cua dung cong ((hinh toan) OR (thanh san)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - manh dung cua dung cong ((hinh toan) or (thanh san)) ban*.