Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thanh thanh » thanh toan, thanh phan, phan thanh
hieu sach » chieu sach, hieu cach, dien sach
doc hieu » toc thieu, hoc thieu, hoc hien
va thong » va phuong, he thong, va cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 - ((thanh thanh) or (nhanh thanh)) ((va thong) OR (va thuong)) cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sach - ((thanh thanh) OR (nhanh thanh)) ((va thong) OR (va thuong)) cong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu sach - ((thanh thanh) or (nhanh thanh)) ((va thong) OR (va thuong)) cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu sach - ((thanh thanh) or (nhanh thanh)) ((va thong) OR (va thuong)) cong tan toan ban*.