Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
tong cong » trong cong, cong cong, dung cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
toan va » doan va, tran van, toan tap
va tong » va thong, va tuong, va trong

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: theo tieu xanh - tinh toan va tong cong tan ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - tinh toan va tong cong tan ((toan cau) or (toan ban))*.