Perhaps you should try some spelling variations:
thuong thuong » thong thuong, thuong phuong, thuong truong
thuong tinh » khuong tinh, thuong binh, truong tinh
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
toan ban » van ban

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