Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, kieu tinh
quang dung » quang trung, ung dung, cuong dung
chau tinh » cuu tinh, ha tinh, cua tinh
dung cong » dung trong
hanh ban » thanh ban, hang ban, hanh san
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (chau tinh)) - ((hanh ban) OR (hang va)) quang dung cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) OR (chau tinh)) - ((hanh ban) or (hang va)) quang dung cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) OR (chau tinh)) - ((hanh ban) or (hang va)) quang dung cong dan toan cau*.