Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
hieu lang » chieu sang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
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 quang) or (hieu lang)) - thanh trung cua trong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quang) OR (hieu lang)) - thanh trung cua trong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quang) or (hieu lang)) - thanh trung cua trong cong dan toan cao*.