Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
truong quan » trong quan, thong quan, luong quan
quan trong » gian trong
hach toan » thanh toan, manh toan
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
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: ((doc hieu) or (ho chieu)) sang - hanh truong quan trong cong ((tac toan) OR (hach toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) sang - hanh truong quan trong cong ((tac toan) OR (hach toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) sang - hanh truong quan trong cong ((tac toan) OR (hach toan)) tap".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) sang - hanh truong quan trong cong ((tac toan) OR (hach toan)) tap*.