Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
cac loc » cac lop, cac toc, cac hoc
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
lap hai » lap tai, lap lai, lap hoat
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
loc va » hoc va, luc va
va dau » va dao
dau vi » dau ve, dau va, dat vi
vi cua » vai cua, di cua
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: su ((sach ty) OR (sac ky)) sang lap hai. hieu ve cac loc va dau vi cua te~.
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) or (sac ky)) sang lap hai. hieu ve cac loc va dau vi cua te*.