Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
su sach » so sach
duc van » duc va, duc tan, duc manh
vu sach » vu bach, vu khach
xang xa » lang xa, mang xa, ang xa
hieu ve » hieu va, hieu van
duc ban » duc tan, dua ban, duc man
va cua » va chua, via cua, ca cua
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua su, cua cu

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: ((su sach) OR (vu sach)) ty xang xa hoi. hieu ve cam ((duc ban) OR (duc van)) thanh va cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ty xang xa hoi. hieu ve cam ((duc ban) or (duc van)) thanh va cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ty xang xa hoi. hieu ve cam ((duc ban) or (duc van)) thanh va cua tu*.