Perhaps you should try some spelling variations:
luong quan » thong quan, duong qua
quang toan » quang tuan, quang tran, quang doan
dung quan » dung quang, dung luan, dang quang
hieu luat » hieu qua
kiem soat » kiem toan
van hieu » cao hieu
toan va » doan va, tran van, toan ban
va kiem » van kien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh ((dung quan) OR (luong quan)) van hieu luat ) or ( tinh quang toan va kiem soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((dung quan) OR (luong quan)) van hieu luat ) OR ( tinh quang toan va kiem soat )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh ((dung quan) OR (luong quan)) van hieu luat ) or ( tinh quang toan va kiem soat ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh ((dung quan) OR (luong quan)) van hieu luat ) or ( tinh quang toan va kiem soat ))*.