Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
trinh toan » thanh toan, trinh han, trinh quan
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung tuan, trung cap
tang cua » mang cua, hang cua, tang luan

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

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