Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh hang » thanh hang, hang hang, hanh han
dung cong » dung trong
khoan cam » khoa cam, khoan va, phan cam
ho chieu » theo chieu, hoc thieu, doi chieu
hang cua » mang cua, hang ca, huong cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, phan cac

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 - hanh hang cua dung cong tan ((khan cap) OR (khoan cam))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh hang cua dung cong tan ((khan cap) OR (khoan cam))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh hang cua dung cong tan ((khan cap) OR (khoan cam))*.