Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
duong cong » dung cong, luong cong, duong trong
dong cong » dung cong, dang cong, cong cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 trinh quan ((dong cong) OR (duong cong)) ((dan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - hanh trinh quan ((dong cong) OR (duong cong)) ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu xanh - hanh trinh quan ((dong cong) OR (duong cong)) ((dan toan) or (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - hanh trinh quan ((dong cong) OR (duong cong)) ((dan toan) or (dan than)) cao*.