Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, hanh mang, hanh tung
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
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: ((doc hieu) or (doi khi)) sach - ((hanh tang) or (anh tang)) cua thong cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (doi khi)) sach - ((hanh tang) OR (anh tang)) cua thong cong dan than ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (doi khi)) sach - ((hanh tang) or (anh tang)) cua thong cong dan than ban*.