Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
thanh thu » thanh thuy, thanh tu, khanh thu
dang van » hoang van, hang va
luong va » dung va

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) OR (chieu sach)) - hanh tranh cua nhung ((dang van) or (luong va)) thanh thu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu sach)) - hanh tranh cua nhung ((dang van) OR (luong va)) thanh thu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chieu sach)) - hanh tranh cua nhung ((dang van) or (luong va)) thanh thu".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chieu sach)) - hanh tranh cua nhung ((dang van) or (luong va)) thanh thu*.