Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
cong bang » cuong bang, dong bang, cong lang
hong bang » dong bang, hang ban, hong hanh
trung va » truong va, trang va, trung ha
va thong » va thuong, va phuong, he thong
phan dau » phan tu, hang dau

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 va thong ((cong bang) OR (hong bang)) phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh trung va thong ((cong bang) OR (hong bang)) phan dau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung va thong ((cong bang) OR (hong bang)) phan dau*.