Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
hoi hieu » hoi phieu, hoi tieu, moi hieu
trung va » truong va, trung ha, trung tam
trang va » tran van, hang va
cong van » cong vang, cong san, song van
juan cao » quang cao, quan cau, juan a
toan cao » toan ban, toan tap

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 ((trung va) or (trang va)) dang cong van ((juan cao) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - thanh ((trung va) OR (trang va)) dang cong van ((juan cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi hieu lang - thanh ((trung va) or (trang va)) dang cong van ((juan cao) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - thanh ((trung va) or (trang va)) dang cong van ((juan cao) OR (toan cao))*.