Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
phuong ban » phuong bang, phuong lan, phuong bac
hieu lang » chieu sang, hieu quang, nhieu tang
han duong » van duong, thanh duong, phan xuong
hai duong » dai cuong, hai phong
ban thanh » ban hanh, ban hang

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 xanh) or (hieu lang)) - hanh trinh ((han duong) OR (hai duong)) phuong ban thanh san~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (hieu lang)) - hanh trinh ((han duong) OR (hai duong)) phuong ban thanh san.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (hieu lang)) - hanh trinh ((han duong) OR (hai duong)) phuong ban thanh san".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (hieu lang)) - hanh trinh ((han duong) OR (hai duong)) phuong ban thanh san*.