Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) or (su sach))) or (toc sach)) ky nang x hoi. hieu ve cam xuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (toc sach)) ky nang x hoi. hieu ve cam xuc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (su sach))) or (toc sach)) ky nang x hoi. hieu ve cam xuc va hanh vi cuu tre*.