Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, chinh truong
manh truong » manh trung, manh tuong, anh truong
doi chieu » doc hieu, doi chi, mot chieu
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » toan cao, toan ban, toan tap
ca dung » cao dung, cap dung, cu dung

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 (ho chieu)) xanh - ((hanh truong) OR (manh truong)) ca dung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - ((hanh truong) OR (manh truong)) ca dung cong tac toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (ho chieu)) xanh - ((hanh truong) OR (manh truong)) ca dung cong tac toan cau*".