Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
doi hieu » doi chieu, doc hieu, doi hien
chinh vi » chinh va, chinh viet, chinh tri
toan ban » van ban
vi hang » voi hang, va hang, vi hanh

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 - hanh chinh vi hang cong trinh toan ban~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh chinh vi hang cong trinh toan ban*.