Perhaps you should try some spelling variations:
cong thuong » hang thuong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
thuong dam » thuong mai, huong dan, truong dai
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
tinh va » tich va, trinh van, trinh vat
va cong » tai cong, cua cong

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)) - nhanh tinh va cong thuong dam ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - nhanh tinh va cong thuong dam ((toan tai) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - nhanh tinh va cong thuong dam ((toan tai) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - nhanh tinh va cong thuong dam ((toan tai) or (toan ban))*.