Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh ve » hanh ve, thanh va, thanh vien
vu sach » vu bach, su sach, vu khach
ty hang » ly hang, thi hang, thu hang
duc ban » duc tan, duc van, dua ban
ve cua » le cua, de cua, te cua
cua te » cua tu
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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 hang) OR (ty xang)) xa hoi. hieu ((ve cam) or (ve cac)) duc ban thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty hang) OR (ty xang)) xa hoi. hieu ((ve cam) OR (ve cac)) duc ban thanh ve cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty hang) OR (ty xang)) xa hoi. hieu ((ve cam) or (ve cac)) duc ban thanh ve cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty hang) OR (ty xang)) xa hoi. hieu ((ve cam) or (ve cac)) duc ban thanh ve cua te*.