Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
hieu ve » hieu va, hieu van
cau luc » cau truc, cau phuc
su sach » so sach, vu sach
ky sang » ky nang, ky dang, ky tang
lap hai » lap tai, lap lai, lap hoat
cam luc » cam xuc
vi cua » vai cua, di cua
va don » va dong, va doc, va do
su sac » su cac, su xac
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su sach)) ky sang lap hai. hieu ve ((cam luc) or (cau luc)) va don vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky sang lap hai. hieu ve ((cam luc) OR (cau luc)) va don vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su sach)) ky sang lap hai. hieu ve ((cam luc) or (cau luc)) va don vi cua tu".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su sach)) ky sang lap hai. hieu ve ((cam luc) or (cau luc)) va don vi cua tu*.