Perhaps you should try some spelling variations:
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
luy tre » luyen tre
ve cam » ve cham, ve cac, va cam
vi luy » vi lua, vi luu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van nang xa hoi. hieu ve cam ((duc va) OR (truc va)) hanh vi luy tre~.
• Adding a wildcard symbol may retrieve word variants: su sach van nang xa hoi. hieu ve cam ((duc va) or (truc va)) hanh vi luy tre*.