Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
tang cua » mang cua, thong cua, quang cua
hang cua » mang cua, hang ca, huong cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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 - hanh ((((tang cua) OR (tang luan))) OR (hang cua)) hang cong tac toan cao~.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((((tang cua) or (tang luan))) or (hang cua)) hang cong tac toan cao*.