Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
su sach » vu sach
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
ky sang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
dan vi » doan vi, don vi, dan 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: ((su sach) OR (so sach)) ky sang lap hai. hieu ve cam ((tuc va) or (duc va)) dan vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky sang lap hai. hieu ve cam ((tuc va) OR (duc va)) dan vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky sang lap hai. hieu ve cam ((tuc va) or (duc va)) dan vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky sang lap hai. hieu ve cam ((tuc va) or (duc va)) dan vi cua te*.