Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chai tinh » chau tinh, cham tinh, nhai tinh
thai tinh » thai binh, thai vinh, thanh tinh
tang luan » dung luan
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang tuan » van tuan, vong tuan, quang tuan
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chai tinh) OR (thai tinh)) - hanh ((tang luan) or (trung tuan)) dung cong vang tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chai tinh) OR (thai tinh)) - hanh ((tang luan) OR (trung tuan)) dung cong vang tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chai tinh) OR (thai tinh)) - hanh ((tang luan) or (trung tuan)) dung cong vang tuan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chai tinh) OR (thai tinh)) - hanh ((tang luan) or (trung tuan)) dung cong vang tuan cau*.