Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ty hang » ty xang, thi hang, thu hang
ly hang » ly quang
hieu ve » hieu va, hieu van
duoc va » nuoc va, duc va, duoc ma
va danh » va dinh, va dan, va hanh
danh va » doanh va, hanh va, anh va
ve tao » ve bao, de tao, ve tac
va cua » va chua, via cua, ca cua
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((ty hang) or (ly hang)) cau hoi. hieu ve tao duoc va danh va cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ty hang) OR (ly hang)) cau hoi. hieu ve tao duoc va danh va cua cu.
• Adding a wildcard symbol may retrieve word variants: thu sach ((ty hang) or (ly hang)) cau hoi. hieu ve tao duoc va danh va cua cu*.