Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
cong dan » cong san, cong tan, huong dan
ho hieu » ho chieu, hoi hieu, nho hieu
mang va » mang vua, hang va, mang xa
dang va » dang van, dang vat, hang va
bang va » hang va, ban va, trang va
dan van » dang van, doan van, dao van

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 ((((mang va) OR (dang va))) or (bang va)) dung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((((mang va) OR (dang va))) OR (bang va)) dung cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((((mang va) OR (dang va))) or (bang va)) dung cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((((mang va) OR (dang va))) or (bang va)) dung cong dan van ban*.