Perhaps you should try some spelling variations:
thanh tung » thanh cong
thieu xanh » chieu xanh, hieu manh, thien danh
cong thang » cong thanh, cang thang, cong thong
thien anh » thien danh, tien anh, thien thanh
tung toan » dung toan, truong toan, quang toan
cong than » cong thanh, cong tan, cong thai
phan cau » phan dau, phan cac, phan tu

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 (thien anh)) - thanh tung toan thong ((cong than) OR (cong thang)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh tung toan thong ((cong than) OR (cong thang)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien anh)) - thanh tung toan thong ((cong than) OR (cong thang)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - thanh tung toan thong ((cong than) OR (cong thang)) phan cau*.