Perhaps you should try some spelling variations:
thanh tung » thanh cong
quang cong » quang cuong, quang dong, quang hoang
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, 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: ((doc hieu) or (ho chieu)) xanh - ((thanh trung) or (thanh tung)) tran quang cong ban toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) xanh - ((thanh trung) OR (thanh tung)) tran quang cong ban toan cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) xanh - ((thanh trung) or (thanh tung)) tran quang cong ban toan cao*.