Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
thanh hanh » thanh thanh, thanh anh, thanh hang
va trong » va truong, va thong, va tuong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
hanh va » hang va, hanh vi

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 - thanh hanh va trong cong tan toan ban~.
• Adding a wildcard symbol may retrieve word variants: toc thieu sach - thanh hanh va trong cong tan toan ban*.