Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, kieu tinh
trung tinh » truong tinh, trong tinh, trung binh
chau tinh » cuu tinh, ha tinh, cua tinh
trung tin » trong tin, trang tin, truong tinh
dung cong » dung trong
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, 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: theo ((chieu tinh) or (chau tinh)) - hanh ((trung tin) OR (trung tinh)) dung cong ban toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (chau tinh)) - hanh ((trung tin) OR (trung tinh)) dung cong ban toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) or (chau tinh)) - hanh ((trung tin) OR (trung tinh)) dung cong ban toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) or (chau tinh)) - hanh ((trung tin) OR (trung tinh)) dung cong ban toan cau*.