Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu sach » chieu sach, hieu cach, dien sach
thong cua » thong quan, thong tu, huong cua
van thanh » van tuan
ban thanh » ban hanh, ban hang
doc hieu » toc thieu, hoc thieu, hoc hien
mang cua » manh cua, dung cua, ban cua

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 - hanh ((thong cua) or (mang cua)) nhung cong ((van thanh) or (ban thanh)) hai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - hanh ((thong cua) OR (mang cua)) nhung cong ((van thanh) OR (ban thanh)) hai.
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - hanh ((thong cua) or (mang cua)) nhung cong ((van thanh) or (ban thanh)) hai*.