Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
sinh cua » manh cua, dinh cuu, sinh va
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - nhan sinh cua nhung ((cong dan) or (cong san)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - nhan sinh cua nhung ((cong dan) OR (cong san)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - nhan sinh cua nhung ((cong dan) or (cong san)) ((toan cau) or (toan ban))*.