Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
va cham » va chat, va tham
sach ky » sac ky, sach y, sach ty
ve cham » ve chat, vu cham, ve chim
luu tre » luu tru, cuu tre, luy tre
soc va » hoc va, loc va, doc va
co hoi » co hoc, co loi
vi luu » vi lua

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: toc sach ky nang ((co hoi) OR (cau hoi)). hieu ((ve cham) OR (va cham)) soc va thanh vi luu tre~.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((co hoi) or (cau hoi)). hieu ((ve cham) or (va cham)) soc va thanh vi luu tre*.