Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
dinh vi » dinh ve, dinh viet, dinh tri
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
lap hai » lap tai, lap lai, lap hoat
hieu ve » hieu va, hieu van
cam loc » cam lo
va dinh » van dinh, va kinh, va tinh
cua tu » cua tuc, cua cu, cua te
ve cam » ve cham, ve cac, va cam
loc va » hoc va, luc va
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 sang) or (ky tang)) lap hai. hieu ve cam loc va dinh vi ((cua tu) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ky sang) OR (ky tang)) lap hai. hieu ve cam loc va dinh vi ((cua tu) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: so sach ((ky sang) or (ky tang)) lap hai. hieu ve cam loc va dinh vi ((cua tu) or (cua su))*.