Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, nhieu tang
duong cong » dung cong, luong cong, duong trong
hieu lang » hieu quang, nhieu tang, hieu van
trinh ve » trinh he, trinh va, trinh vi
ve duong » ke duong, ve huong, ve tuong
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.

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