Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
hoi hieu » hoi phieu, hoi tieu, moi hieu
dung cua » dung luan
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - thanh ((dung cua) OR (dung cho)) dung cong tan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - thanh ((dung cua) OR (dung cho)) dung cong tan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh ((dung cua) OR (dung cho)) dung cong tan toan tap*.