Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
so sach » so sanh, bo sach, co sach
ty dang » ty xang, ky dang, ty hang
lap hai » lap lai, lap hoat, lanh hai
vai cua » dai cua, hai cua, lai cua
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
ve cam » ve cham, ve cac, va cam
loc va » hoc va, luc va
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: so sach ty dang ((lap hai) or (lap tai)). hieu ve cam ((loc va) or (tuc xa)) danh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty dang ((lap hai) OR (lap tai)). hieu ve cam ((loc va) OR (tuc xa)) danh vai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ty dang ((lap hai) or (lap tai)). hieu ve cam ((loc va) or (tuc xa)) danh vai cua te*.