Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc thuyet » hoc chuyen
trung tuan » trung thanh, trung tam, tran tuan
hoc thiet » hoc thieu, hoc hien, toc thieu
tuan bang » tuan dang, tuan hoang, thuat bang
cong dan » cong san, cong tan, cong dong
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 thiet) or (hoc thuyet)) tach - thanh trung tuan bang ((cong dan) OR (huong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thuyet)) tach - thanh trung tuan bang ((cong dan) OR (huong dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc thuyet)) tach - thanh trung tuan bang ((cong dan) OR (huong dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc thuyet)) tach - thanh trung tuan bang ((cong dan) OR (huong dan)) toan cau*.