Perhaps you should try some spelling variations:
lanh tranh » canh tranh, lan tranh, hanh trinh
doi chieu » doc hieu, doi chi, mot chieu
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, mot 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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (ho chieu)) xanh - lanh tranh ((cua ban) or (cua nhung)) cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) xanh - lanh tranh ((cua ban) OR (cua nhung)) cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (ho chieu)) xanh - lanh tranh ((cua ban) or (cua nhung)) cong tan toan cao*.