Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
sach thu » sach thue, sach thieu, sach tham
cac duc » cao duc, cac dac, cac nuoc
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, xach tay
xang xa » lang xa, mang xa, ang xa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ty) OR (sach thu)) xang xa hoi. hieu va ((cac duc) or (cac du)) ban thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach thu)) xang xa hoi. hieu va ((cac duc) OR (cac du)) ban thanh vai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ty) OR (sach thu)) xang xa hoi. hieu va ((cac duc) or (cac du)) ban thanh vai cua te*".