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
hoang manh » hoang minh, hoang anh, hoang xanh
cua thuong » cua truong, cua phuong, ca thuong
hanh manh » hanh mang, lanh manh, thanh minh
cong tac » cong ty
tac trai » tam trai, khac trai, rac thai
trai cao » tai cao, thai cao, trai chan

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)) - ((hanh manh) or (hoang manh)) cua thuong cong tac trai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - ((hanh manh) OR (hoang manh)) cua thuong cong tac trai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - ((hanh manh) or (hoang manh)) cua thuong cong tac trai cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - ((hanh manh) or (hoang manh)) cua thuong cong tac trai cao*.