Perhaps you should try some spelling variations:
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
thong dung » thong cong, thong thuong
cua thong » cua thuong, cua khong, cua tong
cong cua » cong cu, dong cua, huong cua
ban hang » ngan hang
san can » san van, ban can, san chang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sach) or (chieu sach)) - thanh cong cua thong dung ((san can) or (ban hang)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (chieu sach)) - thanh cong cua thong dung ((san can) OR (ban hang)) cau.
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) or (chieu sach)) - thanh cong cua thong dung ((san can) or (ban hang)) cau*.