Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh phan » thanh pho, thanh san, thanh toan
phan cua » nhan cua, than cua, phat cua
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
ly vang » ly hang, ly van, ly quang
ly nang » ky nang, ly hang, ly quang
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cao, va cai

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 ((ly nang) OR (ly vang)) xa hoi. hieu ((va cam) or (va cac)) tuc va thanh phan cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ly nang) OR (ly vang)) xa hoi. hieu ((va cam) OR (va cac)) tuc va thanh phan cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ly nang) OR (ly vang)) xa hoi. hieu ((va cam) or (va cac)) tuc va thanh phan cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((ly nang) OR (ly vang)) xa hoi. hieu ((va cam) or (va cac)) tuc va thanh phan cua tre*.