Perhaps you should try some spelling variations:
duong trong » dung trong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
duong cong » dung cong, luong cong, trong cong
trinh toan » tinh toan, thanh toan, trinh quan
trinh han » trinh quan
dung cua » dung luan, dung cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - thanh dung cua ((duong cong) OR (duong trong)) ((trinh toan) or (trinh han)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh dung cua ((duong cong) OR (duong trong)) ((trinh toan) OR (trinh han)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh dung cua ((duong cong) OR (duong trong)) ((trinh toan) or (trinh han)) cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh dung cua ((duong cong) OR (duong trong)) ((trinh toan) or (trinh han)) cau*.