Perhaps you should try some spelling variations:
quang toan » quang tuan, quang tran, quang doan
tinh dung » tin dung, tinh huong, anh dung
hieu luat » hieu qua
kiem soat » kiem toan
co hieu » cao hieu, doc hieu
toan va » doan va, tran van, toan ban
va kiem » van kien
san co » ban co, sang cho

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