Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
tcanh tranh » thanh thanh, can tranh, lanh tranh
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » dong thanh, cong trinh, cong tan
va phuong » va thuong, cac phuong
ho chieu » theo chieu, hoc thieu, doi chieu
toan cao » toan ban
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - ((canh tranh) or (tcanh tranh)) va phuong cong thanh ((toan cao) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((canh tranh) OR (tcanh tranh)) va phuong cong thanh ((toan cao) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - ((canh tranh) or (tcanh tranh)) va phuong cong thanh ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((canh tranh) or (tcanh tranh)) va phuong cong thanh ((toan cao) OR (toan tap))*.