Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
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: ho ((((hieu lang) or (chieu sang))) or (chieu xanh)) - canh tranh cua nhung cong bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (chieu sang))) OR (chieu xanh)) - canh tranh cua nhung cong bai toan tap.
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu lang) or (chieu sang))) or (chieu xanh)) - canh tranh cua nhung cong bai toan tap*.