Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cao nang » cao dang, cam nang, cao tang
kha nang » phap nang, ky nang, ki nang
ho nang » thi nang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, loc va, doc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((((ho nang) OR (cao nang))) or (kha nang)) xa hoi. hieu ve cham soc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((((ho nang) OR (cao nang))) OR (kha nang)) xa hoi. hieu ve cham soc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((((ho nang) OR (cao nang))) or (kha nang)) xa hoi. hieu ve cham soc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((((ho nang) OR (cao nang))) or (kha nang)) xa hoi. hieu ve cham soc va hanh vi cua tre*.