Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
trinh thuc » trinh thi
trinh tu » trinh ky, trinh do
song tap » tong tap, song tam, cuong tap
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap
ha tinh » va tinh, may tinh

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 (ha tinh)) - hanh ((trinh thuc) OR (trinh tu)) nang song tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (ha tinh)) - hanh ((trinh thuc) OR (trinh tu)) nang song tap toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) or (ha tinh)) - hanh ((trinh thuc) OR (trinh tu)) nang song tap toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (ha tinh)) - hanh ((trinh thuc) OR (trinh tu)) nang song tap toan cao*.