Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thang long » thanh cong
long gian » long giao, luong giao, khong gian
cong dan » cong san, cong tan, huong dan
phan van » pham van, thanh van, luan van
phan dau » phan tu, hang dau
gian do » gian don, gian doc, gian o
do cong » doi cong, do hong, bo cong

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 - thang long gian do cong dan ((phan van) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thang long gian do cong dan ((phan van) OR (phan dau))*.