Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
trinh toan » tinh toan, thanh toan, trinh han
hanh tang » anh tang, hanh mang, hanh tung
va phuong » cac phuong
chu xanh » chu manh, chieu xanh, chua xang
toan cau » toan cao, toan ban, toan tap
cua chu » sua chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: cua chu xanh - ((hanh tang) OR (hanh trang)) ((va phuong) or (va thuong)) cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cua chu xanh - ((hanh tang) OR (hanh trang)) ((va phuong) OR (va thuong)) cong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cua chu xanh - ((hanh tang) OR (hanh trang)) ((va phuong) or (va thuong)) cong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: cua chu xanh - ((hanh tang) OR (hanh trang)) ((va phuong) or (va thuong)) cong trinh toan cau*.