Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
tong cong » trong cong, cong cong, dung cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap
va tong » va thong, va tuong, va trong

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

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