Perhaps you should try some spelling variations:
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh dung » thanh dung, anh dung, hanh dong
dung cong » dung trong
bang cong » dang cong, bang song, hang cong
dung cua » dung luan, dung cho
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan 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 dung cua ((dung cong) or (bang cong)) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh dung cua ((dung cong) OR (bang cong)) dan than tap.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh dung cua ((dung cong) or (bang cong)) dan than tap*.