Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hanh trinh » canh tranh, hanh chinh
ca thuong » cao thuong, cua thuong, va thuong
khi tach » thi tac, khi sac
trinh ca » trinh cau, trinh cua, trinh cac
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan lap, phan van
phan dau » phan tu, hang dau
khi ta » khi va, khi thai, khi tham

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((khi tach) OR (khi ta)) - hanh trinh ca thuong cong dan ((phan cac) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((khi tach) OR (khi ta)) - hanh trinh ca thuong cong dan ((phan cac) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((khi tach) OR (khi ta)) - hanh trinh ca thuong cong dan ((phan cac) or (phan dau))".
• Adding a wildcard symbol may retrieve word variants: doi ((khi tach) OR (khi ta)) - hanh trinh ca thuong cong dan ((phan cac) or (phan dau))*.