Perhaps you should try some spelling variations:
sinh sach » chinh sach, sinh san, sang sach
cua nhung » va nhung
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
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: hoc sinh sach - anh tang cua nhung ((cong ban) OR (cong san)) than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh sach - anh tang cua nhung ((cong ban) OR (cong san)) than cap".
• Adding a wildcard symbol may retrieve word variants: hoc sinh sach - anh tang cua nhung ((cong ban) OR (cong san)) than cap*.