Perhaps you should try some spelling variations:
trang thuat » trong thuat, trang thuc, trang tuan
trang thiet » trong thiet, trinh thiet, toan thiet
chieu sach » chinh sach, chiet tach, chieu sang
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, khoan cam

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 - thanh ((trang thuat) OR (trang thiet)) nhung ((cong dan) or (cong tan)) khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trang thuat) OR (trang thiet)) nhung ((cong dan) OR (cong tan)) khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trang thuat) OR (trang thiet)) nhung ((cong dan) or (cong tan)) khan cap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trang thuat) OR (trang thiet)) nhung ((cong dan) or (cong tan)) khan cap*.