Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
thanh tung » thanh cong
hieu lang » hieu quang, nhieu tang, hieu van
cua trong » cua truong, cua trung, qua trong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) OR (chieu sang)) - ((thanh trung) or (thanh tung)) cua trong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - ((thanh trung) OR (thanh tung)) cua trong cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - ((thanh trung) or (thanh tung)) cua trong cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - ((thanh trung) or (thanh tung)) cua trong cong dan toan cao*.