Perhaps you should try some spelling variations:
chieu xanh » chieu tinh, hieu manh
chieu sang » hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, hieu cach
cang thang » cong thanh, dang thanh
dung cong » dung trong
thang va » hang va, trang va, thong va
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) or (((chieu sang) OR (chieu sach)))) - cang thang va dung cong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (((chieu sang) OR (chieu sach)))) - cang thang va dung cong bai toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (((chieu sang) OR (chieu sach)))) - cang thang va dung cong bai toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (((chieu sang) OR (chieu sach)))) - cang thang va dung cong bai toan cau*.