Perhaps you should try some spelling variations:
tong cong » trong cong, cong cong, dung cong
chu xanh » chu manh, chieu xanh, chua xang
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan tap » toan ban
cho chu » cho thue

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho chu xanh - canh ((tranh va) or (trinh va)) tong cong bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho chu xanh - canh ((tranh va) OR (trinh va)) tong cong bai toan tap.
• Adding a wildcard symbol may retrieve word variants: cho chu xanh - canh ((tranh va) or (trinh va)) tong cong bai toan tap*.