Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chiet tach » chieu sach
chieu tinh » trieu tinh, lieu tinh, chau tinh
thanh tinh » thanh binh, nhanh tinh, than kinh
cua thuong » cua truong, cua phuong, ca thuong
hanh tinh » hanh trinh, nhanh tinh, canh tinh
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan ban » can ban, chat ban, chan nan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (chieu tinh)) - ((hanh tinh) OR (thanh tinh)) cua thuong cong dan chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (chieu tinh)) - ((hanh tinh) OR (thanh tinh)) cua thuong cong dan chan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) or (chieu tinh)) - ((hanh tinh) OR (thanh tinh)) cua thuong cong dan chan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (chieu tinh)) - ((hanh tinh) OR (thanh tinh)) cua thuong cong dan chan ban*.