Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
su sach » vu sach
doan vi » doan va, don vi, doan thi
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
lap hai » lap tai, lap lai, lap hoat
ky sang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
luc va » duc va, tuc va, loc va
dan vi » don vi, dan va, gan vi
ve cam » ve cham, ve cac, va cam

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 luc va ((dan vi) or (doan vi)) cua tuc~.
• 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 luc va ((dan vi) OR (doan vi)) cua tuc.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky sang lap hai. hieu ve cam luc va ((dan vi) or (doan vi)) cua tuc*.