Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh tranh » canh tranh, hanh trinh, hanh trang
hang huong » hang luong, hoang phuong, bang phuong
tranh cua » doanh cua, manh cua
dan chan » dan gian, dan ca, van chat
chan nan » chan nhan, chang nang, chan doan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (chieu sach)) - hanh tranh cua ((hang huong) OR (hang thuong)) dan chan nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - hanh tranh cua ((hang huong) OR (hang thuong)) dan chan nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - hanh tranh cua ((hang huong) OR (hang thuong)) dan chan nan".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - hanh tranh cua ((hang huong) OR (hang thuong)) dan chan nan*.