Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
chinh ta » chinh tai, chinh va, chinh tri
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van thanh, manh toan
ho hieu » ho chieu, hoi hieu, nho hieu
ta dung » tac dung, tan dung, tao dung
van tan » van tuan, van ban, van tai

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 - hanh chinh ta dung cong ((dan toan) or (((van toan) OR (van tan)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh chinh ta dung cong ((dan toan) OR (((van toan) OR (van tan)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh chinh ta dung cong ((dan toan) or (((van toan) OR (van tan)))) cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh chinh ta dung cong ((dan toan) or (((van toan) OR (van tan)))) cau*.