Perhaps you should try some spelling variations:
thanh trung » thanh tung
chat quang » chat luong, pham quang
trung tran » trung tuan, trung thanh, trung tam
tran trong » gian trong, quan trong, tran hong
hieu quan » hieu qua, lieu quan, thien quan
chu quang » vu quang
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (((chu quang) OR (chat quang)))) - thanh trung tran trong cong san toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quan) or (((chu quang) OR (chat quang)))) - thanh trung tran trong cong san toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) or (((chu quang) OR (chat quang)))) - thanh trung tran trong cong san toan cao*.