Perhaps you should try some spelling variations:
trien thuat » thien thuat, trien hoat, chien thuat
chieu xanh » chieu sach, chieu sang, chieu tinh
tran thuat » trong thuat, tran tuan, tran thuy
nhung cong » dung cong, thong cong, hang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va tinh » may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (va tinh)) - manh ((tran thuat) OR (trien thuat)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (va tinh)) - manh ((tran thuat) OR (trien thuat)) nhung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (va tinh)) - manh ((tran thuat) OR (trien thuat)) nhung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (va tinh)) - manh ((tran thuat) OR (trien thuat)) nhung cong dan toan cau*.