Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
phap thong » phap phong, phap chong, pho thong
cap thong » cap tong, chap thuong, chap phong
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sach - hanh trung ((cap thong) or (phap thong)) cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - hanh trung ((cap thong) OR (phap thong)) cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - hanh trung ((cap thong) or (phap thong)) cong dan van ban*.