Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh tranh » hanh trinh, hanh trang, lanh tranh
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
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.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - ((hanh tranh) or (canh tranh)) cua thong cong ((tan toan) OR (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - ((hanh tranh) OR (canh tranh)) cua thong cong ((tan toan) OR (tap toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - ((hanh tranh) or (canh tranh)) cua thong cong ((tan toan) OR (tap toan)) cau*".