Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sang) OR (chieu sach)) - hanh ((trang cua) or (tranh cua)) thuong cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu sach)) - hanh ((trang cua) OR (tranh cua)) thuong cong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) OR (chieu sach)) - hanh ((trang cua) or (tranh cua)) thuong cong dan than cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) OR (chieu sach)) - hanh ((trang cua) or (tranh cua)) thuong cong dan than cao*.