Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » hanh chinh
chau tinh » cuu tinh, ha tinh, cua tinh
chu nang » chuc nang, chua nang, cuu nang
song tap » tong tap, song tam, cuong tap
tap toan » tap doan, tap quan, bai toan
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: theo ((chieu xanh) or (chau tinh)) - ((hanh trinh) OR (canh tranh)) chu nang song tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chau tinh)) - ((hanh trinh) OR (canh tranh)) chu nang song tap toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (chau tinh)) - ((hanh trinh) OR (canh tranh)) chu nang song tap toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chau tinh)) - ((hanh trinh) OR (canh tranh)) chu nang song tap toan cao*.