Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
cau luc » cau truc, cau phuc
ky sang » ky nang, ky dang, ky tang
lap hai » lap tai, lap hoat, lanh hai
lap lai » lap tai, lay lai, lam lai
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
cac luc » coc luc, cac nuoc, cac cuoc
di cua » dai cua, doi cua, de cua
dan di » danh di, dan da, dan de
va dan » ca dan, va dao, va dau
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: so sach ky sang ((lap hai) or (lap lai)). hieu ve ((cac luc) OR (cau luc)) va dan di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang ((lap hai) OR (lap lai)). hieu ve ((cac luc) OR (cau luc)) va dan di cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky sang ((lap hai) or (lap lai)). hieu ve ((cac luc) OR (cau luc)) va dan di cua te*".