Perhaps you should try some spelling variations:
thanh chung » thanh chuong, thanh hung, thanh phuong
dang cong » dung cong
cong lang » cong vang, cong luong, cong quang
lang phan » nang phan, lang thang, lang phong
doc hieu » hoc thieu, hoc hien
chung vu » chung cu, chung tu, chung vi
vu dang » su dang, vu quang, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) OR (toc thieu)) sach - thanh chung vu dang cong lang phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) sach - thanh chung vu dang cong lang phan tu".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) sach - thanh chung vu dang cong lang phan tu*.