Perhaps you should try some spelling variations:
lap hoat » tap hoa, dan hoat, lap dat
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
lap hai » lap tai, lap lai, lanh hai
su sach » vu sach
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, tuc va, loc va
va dan » ca dan, va dao, va dau
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) OR (lap hoat)). hieu ve cam luc 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) OR (lap hoat)). hieu ve cam luc 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) OR (lap hoat)). hieu ve cam luc va dan vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky sang ((lap hai) OR (lap hoat)). hieu ve cam luc va dan vi cua te*.