Perhaps you should try some spelling variations:
hieu binh » hieu kinh, tieu binh, chieu tinh
kieu tinh » lieu tinh, trieu tinh, diep tinh
cong dan » cong san, cong tan, huong dan
cong da » cong dac, cong dau, cong ha
da cong » dai cong, dam cong, va cong
dan van » dang van, doan van, dao van
van van » tan van, san van, van vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu binh) or (kieu tinh)) - thanh cong da cong dan van van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu binh) OR (kieu tinh)) - thanh cong da cong dan van van ban*.