Perhaps you should try some spelling variations:
phan thuong » hang thuong, phan xuong
thanh trung » thanh tung
thuong cong » thong cong, thuong con, thuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » canh tranh, hanh trinh, minh trang
cong san » cong tac
phan tap » phan lap, pha tap, phan tu
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((hanh trang) OR (thanh trung)) phan thuong cong san ((phan tap) or (han tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh trang) OR (thanh trung)) phan thuong cong san ((phan tap) OR (han tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh trang) OR (thanh trung)) phan thuong cong san ((phan tap) or (han tap))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh trang) OR (thanh trung)) phan thuong cong san ((phan tap) or (han tap))*.