Perhaps you should try some spelling variations:
quang viet » quan viet, quang vien, nang viet
thieu sach » chieu sach, thien hach, hieu cach
dung hoang » dang hoang, dung hong, khung hoang
viet dung » viet hung, viet huong, viet trung
hieu cac » hieu luc, hieu va, hieu van
van tuan » van quan, anh tuan

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 cac)) - nhanh quang viet dung hoang ((van tuan) or (van ban)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cac)) - nhanh quang viet dung hoang ((van tuan) OR (van ban)) tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cac)) - nhanh quang viet dung hoang ((van tuan) or (van ban)) tap*.