Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong dang » cong dong, cong dung, cong danh
cong dan » cong san, cong tan, huong dan
ran cau » van cau, ban cau, can cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh trung cua thong ((cong dang) OR (cong dan)) ran cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh trung cua thong ((cong dang) OR (cong dan)) ran cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung cua thong ((cong dang) OR (cong dan)) ran cau*.