Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung thuat » trong thuat, thuong thuat, trung tuan
chieu xanh » chieu sach, chieu sang, chieu tinh
chau tinh » cuu tinh, ha tinh, cua tinh
tac toan » tap toan, tam toan, hach 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: theo ((chieu xanh) or (chau tinh)) - thanh trung thuat ((dung cong) OR (dung trong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chau tinh)) - thanh trung thuat ((dung cong) OR (dung trong)) tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chau tinh)) - thanh trung thuat ((dung cong) OR (dung trong)) tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chau tinh)) - thanh trung thuat ((dung cong) OR (dung trong)) tac toan cau*.