Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
vai cua » dai cua, hai cua, lai cua
dau vai » dau va, dau hai, dau tai
hieu ve » hieu va, hieu van
ly nang » ky nang, ly vang, ly quang
ly hang » ly quang
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ((ly nang) or (((ly hang) or (ty xang)))) xa hoi. hieu ve cam xuc va dau vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ly nang) OR (((ly hang) OR (ty xang)))) xa hoi. hieu ve cam xuc va dau vai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ((ly nang) or (((ly hang) or (ty xang)))) xa hoi. hieu ve cam xuc va dau vai cua tre*.