Perhaps you should try some spelling variations:
va phuong » va thuong, cac phuong
chi xanh » chi anh, chi danh, chi hanh
va thong » va thuong, he thong, va cong
cong van » cong vang, cong san, song van
van luan » van quan, van tuan, von luan
luan ban » luan van, luan san, luan han
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 tranh ((va thong) or (va phuong)) cong van luan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh tranh ((va thong) OR (va phuong)) cong van luan ban*.