Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
canh trinh » canh tranh, hanh trinh, canh tinh
thang cong » thanh cong, thang long, thong cong
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong lang » cong vang, cong luong, cong quang
lang than » lang thang, lang thanh, sang than
te thang » le thang, te than, ke thang
than cap » khan cap, thanh lap, thanh cac

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 - ((canh trinh) or (hanh tinh)) te thang cong lang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - ((canh trinh) OR (hanh tinh)) te thang cong lang than cap*.