Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cham tuc » nham thuc, pham thuc, tham thuc
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cu tren » tu tren, dua tren
y nang » ly nang, v nang, may nang
tuc va » thuc va, truc va, tuc xa
di cu » di cau, di cua, di du

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 ((y nang) or (ky nang)) xa hoi. lieu va cham tuc va hanh di cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((y nang) OR (ky nang)) xa hoi. lieu va cham tuc va hanh di cu tren.
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((y nang) or (ky nang)) xa hoi. lieu va cham tuc va hanh di cu tren*.