Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
hoang cao » hoang bao, hoang hao, hoang thao
cua dung » cua dang, cua dong, qua dung
hoan cau » toan cau, hoa cau, khoan cam
cong li » cong ti, hong li, cong hai

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: ho ((chieu sang) OR (hieu lang)) - hanh trinh cua dung cong li ((hoan cau) OR (hoang cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - hanh trinh cua dung cong li ((hoan cau) OR (hoang cao))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - hanh trinh cua dung cong li ((hoan cau) OR (hoang cao))*.