Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
thong cong » trong cong, tong cong, thong thong
bang cong » dang cong, bang song, hang cong
tuong va » truong va, thuong va, luong va
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) or (chieu sach)) - thanh tuong va ((thong cong) or (bang cong)) dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh tuong va ((thong cong) OR (bang cong)) dan van ban.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - thanh tuong va ((thong cong) or (bang cong)) dan van ban*.