Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
song van » hoang van, trong van, duong van
toan cau » toan cao, toan ban, toan tap

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 xanh) or (hieu manh)) - canh tranh cua nhung ((cong vang) or (song van)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - canh tranh cua nhung ((cong vang) OR (song van)) toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - canh tranh cua nhung ((cong vang) or (song van)) toan cau*.