Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu sang » chieu sach, chieu xanh, hieu lang
cua thuong » cua truong, cua phuong, ca thuong
anh nang » ganh nang, anh bang, anh dang
nang cua » mang cua, hang cua, nang dua
cong tan » cong tac, cong san, cong thanh
chat cao » chat cho, chat bao, chat cam
hieu va » lieu va, hieu qua
chat co » thuat co, chat cua, chat deo

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 (hieu va)) - anh nang cua thuong cong tan ((chat cao) OR (chat co))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu va)) - anh nang cua thuong cong tan ((chat cao) OR (chat co)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (hieu va)) - anh nang cua thuong cong tan ((chat cao) OR (chat co))".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (hieu va)) - anh nang cua thuong cong tan ((chat cao) OR (chat co))*.