Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
va thong » va phuong, he thong, va cong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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