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 dan » thong van, tuong dan, thong den
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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 dan khan 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 dan khan cap*.