Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, phong chong
tuong cua » truong cua, huong cua, thong cua
ho chieu » theo chieu, hoc thieu, doi chieu
dan van » dang van, doan van, dao van

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 sang - thanh tuong cua ((thong cong) or (thong thong)) dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh tuong cua ((thong cong) OR (thong thong)) dan van ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh tuong cua ((thong cong) or (thong thong)) dan van ban*.