Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » canh tranh, hanh trinh, hanh trang
cua thuong » cua truong, cua phuong, ca thuong
tranh cua » doanh cua, manh cua
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - hanh tranh cua thuong cong ((tan toan) OR (tap toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh tranh cua thuong cong ((tan toan) OR (tap toan)) cau*.