Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
tang luan » dung luan
bang cong » dang cong, bang song, hang cong
hang cua » mang cua, hang ca, huong cua
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: theo tieu xanh - hanh ((tang luan) or (hang cua)) bang cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh ((tang luan) OR (hang cua)) bang cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh ((tang luan) or (hang cua)) bang cong tac toan cau*.