Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
toan tuan » tran tuan, toan quan, doan tuan
tuan bang » tuan dang, tuan hoang, thuat bang
bang cong » dang cong, bang song, hang cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: toc thieu sach - tinh toan tuan bang cong tac toan ban~.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - tinh toan tuan bang cong tac toan ban*.