Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
thanh phan » thanh pho, thanh san, thanh toan
hanh tang » hanh trang, anh tang, hanh mang
tan thanh » tran thanh, tang thanh, toan thanh
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
hieu va » lieu va, hieu qua
tang va » trang va, tang van, thang va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((hieu va) or (chieu sang)) - hanh tang va thong cong tan thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((hieu va) OR (chieu sang)) - hanh tang va thong cong tan thanh phan*.