Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
chinh ta » chinh tai, chinh tri
chinh va » chinh tai, hanh va, tinh va
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((chinh ta) OR (chinh va)) nhung cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((chinh ta) OR (chinh va)) nhung cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((chinh ta) OR (chinh va)) nhung cong san toan ban*.