Perhaps you should try some spelling variations:
nhanh thanh » phan thanh, nhanh tinh
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh vat » thanh van, thanh dat, thanh va
vung song » vung dong, xuong song, nang song
vat vung » vat dung, sat vung, va vung
van toan » van tuan, van tan, van thanh

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 (thien hach)) - nhanh thanh vat vung song ((van toan) OR (anh tuan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (thien hach)) - nhanh thanh vat vung song ((van toan) or (anh tuan)) tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (thien hach)) - nhanh thanh vat vung song ((van toan) or (anh tuan)) tap*.