Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
nhanh lang » nhanh quang, nhanh thang, nhanh dong
doi chieu » doc hieu, doi chi, ho chieu
nhan dang » nhan dan, phan dang, tran dang
tong cong » trong cong, cong cong, dung cong
doan van » doan va, hoang van, luan van
va tong » va thong, va tuong, va trong
dan van » dang van, dao van, tan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - ((nhanh lang) or (nhan dang)) va tong cong ((dan van) OR (doan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((nhanh lang) OR (nhan dang)) va tong cong ((dan van) OR (doan van)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((nhanh lang) or (nhan dang)) va tong cong ((dan van) OR (doan van)) ban*".