Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
kha nang » phap nang, ki nang, thi nang
ho nang » thi nang, cao 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 (((kha nang) OR (ky 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 (((kha nang) OR (ky 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 (((kha nang) OR (ky 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 (((kha nang) OR (ky nang)))) xa hoi. hieu ve cham soc va hanh vi cua tre*.