Perhaps you should try some spelling variations:
chinh van » chinh va, chinh can, chinh ngan
chinh ban » chinh bao, chinh can, chinh ngan
hang cong » dang cong, hang nong, bang cong
chi xanh » chi anh, chi danh, chi hanh
cong van » cong vang, cong san, song van
van tai » von tai, van tuan
tai cua » thai cua, tai cuc, tri cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) or (chi nhanh)) - hanh ((chinh van) OR (chinh ban)) hang cong van tai cua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi nhanh)) - hanh ((chinh van) OR (chinh ban)) hang cong van tai cua.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) or (chi nhanh)) - hanh ((chinh van) OR (chinh ban)) hang cong van tai cua".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi nhanh)) - hanh ((chinh van) OR (chinh ban)) hang cong van tai cua*.