Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phuong hoang
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
phung cong » nhung cong, phong cong, nhung chong
tranh van » tran van, trinh van, thanh van
hach van » bach van, cach van, hanh van

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 (chieu xanh)) - canh tranh van ((phuong cong) or (phung cong)) hach van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh van ((phuong cong) OR (phung cong)) hach van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - canh tranh van ((phuong cong) or (phung cong)) hach van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - canh tranh van ((phuong cong) or (phung cong)) hach van ban*.