Perhaps you should try some spelling variations:
dong truong » duong truong, dong thuong, dong trung
hanh trinh » canh tranh, hanh chinh
chieu sach » chinh sach, chiet tach, chieu sang
dong trong » duong trong, dung trong, cong trong
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
dang toan » dang tran, dan toan, dung toan
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 sach) or (hieu lang)) - hanh trinh cua ((dong truong) OR (dong trong)) dang toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu lang)) - hanh trinh cua ((dong truong) OR (dong trong)) dang toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (hieu lang)) - hanh trinh cua ((dong truong) OR (dong trong)) dang toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu lang)) - hanh trinh cua ((dong truong) OR (dong trong)) dang toan cau*.