Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
nhung song » nhung cong, nhung bong, nhung chong
hieu cach » hieu cac, chieu sach, hieu ca
tran hong » tran hoang, tran trong, tranh hang
cua nhung » va nhung
van thanh » ban thanh
hong cua » huong cua, thong cua, cong cua
van tuan » van quan, van ban, anh tuan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - tran hong cua nhung song ((van thanh) OR (van tuan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (hieu cach)) - tran hong cua nhung song ((van thanh) OR (van tuan)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cach)) - tran hong cua nhung song ((van thanh) OR (van tuan)) cau*.