Perhaps you should try some spelling variations:
thanh tung » thanh cong
thieu xanh » chieu xanh, hieu manh, thien anh
thong cong » trong cong, tong cong, thong thong
tung toan » dung toan, truong toan, quang toan
cong than » cong thanh, cong thang, cong tan
tien anh » tieng anh, tien manh, dien anh
phan cau » phan dau, phan cac, phan lap

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