Perhaps you should try some spelling variations:
phuong cong » phong cong, phung cong, phuong hoang
phuong dong » phuong dung, phuong hoang, chuong duong
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh hang » thanh hang, hanh han, hanh mang
hang hang » nang hang, cang thang, hung thang
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((hanh hang) OR (hang hang)) va ((phuong cong) OR (phuong dong)) dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((hanh hang) OR (hang hang)) va ((phuong cong) or (phuong dong)) dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((hanh hang) OR (hang hang)) va ((phuong cong) or (phuong dong)) dan toan cau*.