Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
trinh toan » tinh toan, trinh han, trinh quan
thanh toan » thanh hoa, thanh san, tinh toan
nhung cong » dung cong, thong cong, hang cong
chinh cau » chinh chau, chinh ca, chinh can
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, can cau, nhanh cau

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