Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va, hieu van
lap hai » lap tai, lap lai, lap hoat
ty hang » ly hang, ty xang, thi hang
ty dang » ty xang, ky dang, ty dong
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
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) OR (ty hang)) lap hai. hieu ve cam ((luc va) or (tuc xa)) danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty dang) OR (ty hang)) lap hai. hieu ve cam ((luc va) OR (tuc xa)) danh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ty dang) OR (ty hang)) lap hai. hieu ve cam ((luc va) or (tuc xa)) danh vi cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ((ty dang) OR (ty hang)) lap hai. hieu ve cam ((luc va) or (tuc xa)) danh vi cua te*.