Perhaps you should try some spelling variations:
dang lap » dan lap, dung lap, sang lap
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
sach ky » sach y, sach ty, sach kem
loc va » hoc va
vi cua » vai cua, di cua
dan vi » doan vi, don vi, dan va
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va
sac ky » cac ky, sai ky
cua te » cua tu

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: so ((sach ky) OR (sac ky)) dang lap hai. hieu ve cam ((luc va) OR (loc va)) dan vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sac ky)) dang lap hai. hieu ve cam ((luc va) or (loc va)) dan vi cua te~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sac ky)) dang lap hai. hieu ve cam ((luc va) or (loc va)) dan vi cua te*.