Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
kinh vi » dinh vi, kinh ve, kenh vi
luc qua » luc quan, luc cua, luc nua
cam luc » cam xuc, cau luc
hieu ve » hieu va, hieu van
lap hai » lap tai, lap lai, lap hoat
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
ve cam » ve cham, ve cac, va cam
cua tu » cua tuc, cua cu, cua te
cua su » qua su

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 dang) or (ky tang)) lap hai. hieu ve cam luc qua kinh vi ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky dang) OR (ky tang)) lap hai. hieu ve cam luc qua kinh vi ((cua tu) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: so sach ((ky dang) or (ky tang)) lap hai. hieu ve cam luc qua kinh vi ((cua tu) or (cua su))*.