Perhaps you should try some spelling variations:
chung cong » chong cong, phung cong, chung thong
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
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 ((chung cong) OR (nhung cong)) tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang luan ((chung cong) OR (nhung cong)) tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang luan ((chung cong) OR (nhung cong)) tac toan cau*.