Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
doi chieu » doc hieu, doi chi, ho chieu
trung cua » truong cua, trung cap, dung cua
khoan cam » khoa cam, khoan va, thuan cam
cong tac » cong ty
phan cam » phan cac, phan cau, phan cang

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 - thanh ((trung cua) or (trung tuan)) thuong cong tac ((khoan cam) OR (phan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung cua) OR (trung tuan)) thuong cong tac ((khoan cam) OR (phan cam)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh ((trung cua) or (trung tuan)) thuong cong tac ((khoan cam) OR (phan cam))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung cua) or (trung tuan)) thuong cong tac ((khoan cam) OR (phan cam))*.