Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
truong cua » truong ca, truong quan, truong cao
trung cua » trung tuan, trung cap, dung cua
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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 (trieu tinh)) - thanh ((trung cua) OR (truong cua)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (trieu tinh)) - thanh ((trung cua) OR (truong cua)) dung cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (trieu tinh)) - thanh ((trung cua) OR (truong cua)) dung cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (trieu tinh)) - thanh ((trung cua) OR (truong cua)) dung cong tan toan cau*.