Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chi xanh » chi anh, chi danh, chi hanh
doanh va » doanh tai, doanh cua, hanh va
cong van » cong vang, cong san, song van
van than » van thanh, van thang, van tuan
than ban » thanh ban, toan ban, than man
doi chi » doi khi

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 - canh ((doanh va) or (doan va)) nhung cong van than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh ((doanh va) OR (doan va)) nhung cong van than ban.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh ((doanh va) or (doan va)) nhung cong van than ban*.