Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
dai nhung » ai nhung, dai khung, dap nhung
manh toan » thanh toan, anh tuan, tinh toan
tung dai » trung dai, tuong dai, tung dan
dan toan » van toan, dan than, xuan 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) or (thien anh)) - thanh tung dai nhung cong ((dan toan) OR (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (thien anh)) - thanh tung dai nhung cong ((dan toan) OR (manh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu xanh) or (thien anh)) - thanh tung dai nhung cong ((dan toan) OR (manh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu xanh) or (thien anh)) - thanh tung dai nhung cong ((dan toan) OR (manh toan)) cao*.