Perhaps you should try some spelling variations:
hien sang » hien trang, khien bang, chieu sang
hanh tran » hanh trang, thanh tran, thanh trang
hanh tram » hanh tam, hanh trang, thanh tran
dung cong » dung trong
van dung » van dong, xay dung, tin dung
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - ((hanh tran) or (hanh tram)) van dung cong ((dan toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - ((hanh tran) OR (hanh tram)) van dung cong ((dan toan) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - ((hanh tran) or (hanh tram)) van dung cong ((dan toan) or (van toan)) cau*.