Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
thong cua » thong quan, thong tu, huong cua
tong cong » trong cong, cong cong, dung cong
cong cua » cong cu, dong cua, huong cua
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 - thanh ((thong cua) or (cong cua)) tong cong san ((toan cau) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((thong cua) OR (cong cua)) tong cong san ((toan cau) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((thong cua) or (cong cua)) tong cong san ((toan cau) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((thong cua) or (cong cua)) tong cong san ((toan cau) OR (toan ban))*.