Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua nhung » va nhung
hach toan » thanh toan, manh toan
theo chu » theo chieu, cho chu, chao chu
tinh cua » trinh cua, sinh cua, tinh chat
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: ((doi chieu) or (theo chu)) sang - hanh tinh cua nhung cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chu)) sang - hanh tinh cua nhung cong ((tac toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chu)) sang - hanh tinh cua nhung cong ((tac toan) or (hach toan)) cau*.