Perhaps you should try some spelling variations:
hieu sach » chieu sach, hieu cach, dien sach
cua nhung » va nhung
hieu cac » hieu luc, hieu va, hieu van
cua hang » cua dang, cua cong, cua ban
cong tap » cuong tap, cong tac, cong tan
tap quan » tac quan, hai quan
quan cao » quang cao, quan cau, quan ao

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) or (hieu cac)) - canh tranh ((cua hang) or (cua nhung)) cong tap quan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (hieu cac)) - canh tranh ((cua hang) OR (cua nhung)) cong tap quan cao.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (hieu cac)) - canh tranh ((cua hang) or (cua nhung)) cong tap quan cao*.