Perhaps you should try some spelling variations:
luan trong » quan trong, luat trong, luan tuong
doi chieu » doc hieu, doi chi, thi chieu
hanh dung » thanh dung, anh dung, hanh dong
ho chieu » theo chieu, hoc thieu, thi chieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (((ho chieu) OR (doi chieu)))) xanh - hanh dung luan trong cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (((ho chieu) OR (doi chieu)))) xanh - hanh dung luan trong cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (((ho chieu) OR (doi chieu)))) xanh - hanh dung luan trong cong tan toan cao*.