Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
nhieu tang » chieu sang, hieu lang, nhiet nang
hanh trung » thanh trung, hanh trang, manh trung
thuong dan » huong dan, thuong han, thuong lan
thuong dam » thuong mai, huong dan, truong dai
trung cua » truong cua, trung tuan, trung cap
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu xanh) or (nhieu tang)) - hanh trung cua cong ((thuong dan) OR (thuong dam)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (nhieu tang)) - hanh trung cua cong ((thuong dan) OR (thuong dam)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (nhieu tang)) - hanh trung cua cong ((thuong dan) OR (thuong dam)) toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (nhieu tang)) - hanh trung cua cong ((thuong dan) OR (thuong dam)) toan tap*.