Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
cua nhung » va nhung
lanh ban » lanh bang, lang ban, doanh ban
san toan » dan toan, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) OR (hieu cach)) - lanh ban cua nhung cong ((san toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - lanh ban cua nhung cong ((san toan) OR (van toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - lanh ban cua nhung cong ((san toan) or (van toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - lanh ban cua nhung cong ((san toan) or (van toan)) cau*.