Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
quang cong » quang cuong, quang dong, quang hoang
tran tran » tan tran, tran tuan, tran tan
doc hieu » toc thieu, hoc thieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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 (hoc hien)) tinh - thanh tran tran quang cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc hien)) tinh - thanh tran tran quang cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc hien)) tinh - thanh tran tran quang cong tac toan cau*.