Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh thong » anh thong, hanh trong, hang thong
thong gian » khong gian, thong giao, chong gian
gian lang » gian dan
lang cong » dang cong, bang cong, hang cong
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau
phan van » pham van, thanh van, luan 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 thong gian lang cong dan ((phan dau) OR (phan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - hanh thong gian lang cong dan ((phan dau) OR (phan van))*".