Perhaps you should try some spelling variations:
sinh sach » chinh sach, sang sach, sinh danh
manh hung » anh huong
cua thong » cua thuong, cua khong, cua tong
sinh san » trinh san, sinh vat, sinh va
hung cua » huong cua, chung cua, khung cua
cong san » cong tac
chan nan » chan nhan, chang nang, chan doan

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) OR (sinh san)) - manh hung cua thong ((cong dong) or (cong san)) chan nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sinh sach) OR (sinh san)) - manh hung cua thong ((cong dong) OR (cong san)) chan nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sinh sach) OR (sinh san)) - manh hung cua thong ((cong dong) or (cong san)) chan nan".
• Adding a wildcard symbol may retrieve word variants: hoc ((sinh sach) OR (sinh san)) - manh hung cua thong ((cong dong) or (cong san)) chan nan*.