Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
truong va » truong dai, truong cao, truong dao
lang cong » dang cong, bang cong, hang cong
doi hieu » doi chieu, doc hieu, doi hien
trung va » trang va, trung ha, trung tam
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: doi hieu lang - thanh ((trung va) or (truong va)) lang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh ((trung va) OR (truong va)) lang cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh ((trung va) or (truong va)) lang cong dan toan cao*.