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