Perhaps you should try some spelling variations:
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hanh tang » hanh trang, hanh mang, hanh tung
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
anh tang » anh bang, anh dang, anh nang
van dang » van dong, van dung, van nang
tran cao » toan cao, tran chau, trang cho

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: theo chu xanh - ((hanh tang) OR (anh tang)) van dang ((cong thanh) OR (dong thanh)) tran cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - ((hanh tang) or (anh tang)) van dang ((cong thanh) OR (dong thanh)) tran cao~".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - ((hanh tang) or (anh tang)) van dang ((cong thanh) OR (dong thanh)) tran cao*.