Perhaps you should try some spelling variations:
sinh sach » chinh sach, sinh san, sang sach
hanh manh » hanh mang, lanh manh, hoang manh
dang cong » dung cong
thuat cam » thuat dam, thuat chan, thuat co
manh cua » doanh cua, ban cua
cua dang » cua cong, cua ban
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh sach - hanh manh cua dang cong san ((thuat cam) or (thuat xay))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - hanh manh cua dang cong san ((thuat cam) OR (thuat xay))*.