Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trang » thanh trung, hanh trinh, minh trang
trinh toan » tinh toan, thanh toan, trinh han
ho chieu » theo chieu, hoc thieu, doi chieu
doc hieu » toc thieu, hoc thieu, hoc hien
toan cau » toan cao, toan ban, toan tap

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) or (doc hieu)) xanh - ((hanh trang) OR (canh tranh)) he thong cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doc hieu)) xanh - ((hanh trang) OR (canh tranh)) he thong cong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (doc hieu)) xanh - ((hanh trang) OR (canh tranh)) he thong cong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doc hieu)) xanh - ((hanh trang) OR (canh tranh)) he thong cong trinh toan cau*.