Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
hanh mang » nhanh mang, hanh trang, nhanh lang
mang cua » manh cua, dung cua, ban cua
cong tan » cong tac, cong san, cong ty
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - hanh mang cua cong ((cong tan) OR (cong thanh)) than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh mang cua cong ((cong tan) OR (cong thanh)) than ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh mang cua cong ((cong tan) OR (cong thanh)) than ban*.