Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
tran tap » tran tan, tran tuan, trang tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu xanh)) - thanh trung cua thong cong thanh ((tran tap) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - thanh trung cua thong cong thanh ((tran tap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu xanh)) - thanh trung cua thong cong thanh ((tran tap) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu xanh)) - thanh trung cua thong cong thanh ((tran tap) OR (toan tap))*.