Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
cong thong » cong thuong, cong trong, dong thong
bien tinh » bi tinh, yen tinh, diep tinh
tranh cua » doanh cua, manh cua
thong van » trong van, thong va, thong quan
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (bien tinh)) - canh tranh cua cong thong van than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (bien tinh)) - canh tranh cua cong thong van than cap*.