Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((hanh mang) or (hanh trinh)) cua dung cong dan chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((hanh mang) OR (hanh trinh)) cua dung cong dan chan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((hanh mang) or (hanh trinh)) cua dung cong dan chan cau*.