Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » hanh chinh
trung cong » truong cong, trong cong, trung uong
cua trung » cua truong, xuan trung, cua nhung
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: toc thieu xanh - ((canh tranh) or (hanh trinh)) cua trung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - ((canh tranh) OR (hanh trinh)) cua trung cong tan toan cao*.