Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, nhieu tang
nganh toan » nganh thanh, thanh toan, manh toan
hieu lang » hieu quang, nhieu tang, hieu van
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
dang toan » dang tran, dan toan, dung toan
cua dung » cua dang, cua dong, qua dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) OR (chieu sang)) - hanh trinh cua dung cong ((dang toan) or (nganh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sang)) - hanh trinh cua dung cong ((dang toan) OR (nganh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) OR (chieu sang)) - hanh trinh cua dung cong ((dang toan) or (nganh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) OR (chieu sang)) - hanh trinh cua dung cong ((dang toan) or (nganh toan)) cau*.