Perhaps you should try some spelling variations:
duong cuong » duong cong, duong vuong, duong truong
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cuong dan » cuong danh, huong dan, cong dan
tra tuan » tran tuan, tra quan, ta tuan
tri tuan » tri quan, tran tuan, tri tue
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 (hieu manh)) - thanh ((tra tuan) OR (tri tuan)) duong cuong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (hieu manh)) - thanh ((tra tuan) OR (tri tuan)) duong cuong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu xanh) or (hieu manh)) - thanh ((tra tuan) OR (tri tuan)) duong cuong dan than cau".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu xanh) or (hieu manh)) - thanh ((tra tuan) OR (tri tuan)) duong cuong dan than cau*.