Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien danh
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
huong cua » dung cua
dong cua » dung cua, cong cua, thong cua
cong bai » cuong bai, cong hai, cung bai
bai toan » bai tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu xanh) or (thien anh)) - thanh ((dong cua) OR (huong cua)) nhung cong bai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (thien anh)) - thanh ((dong cua) OR (huong cua)) nhung cong bai toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu xanh) or (thien anh)) - thanh ((dong cua) OR (huong cua)) nhung cong bai toan ban".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu xanh) or (thien anh)) - thanh ((dong cua) OR (huong cua)) nhung cong bai toan ban*.