Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
hieu sach » chieu sach, hieu cach, hieu cac
dien sach » dien anh
cua thong » cua thuong, cua khong, cua tong
mang cua » manh cua, dung cua, ban cua
toan cao » toan tap
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: doc ((hieu sach) OR (dien sach)) - cach mang cua thong cong thanh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (dien sach)) - cach mang cua thong cong thanh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sach) OR (dien sach)) - cach mang cua thong cong thanh ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) OR (dien sach)) - cach mang cua thong cong thanh ((toan cao) or (toan ban))*.