Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
va cham » va chat, va tham
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
va nham » va tham, va nha, va kham
ty nang » ky nang, ty xang, ty hang
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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) or (thuat sach)) ty nang x hoi. lieu ((va nham) OR (va cham)) thuc va danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) ty nang x hoi. lieu ((va nham) OR (va cham)) thuc va danh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thuat sach)) ty nang x hoi. lieu ((va nham) OR (va cham)) thuc va danh va cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) ty nang x hoi. lieu ((va nham) OR (va cham)) thuc va danh va cua tre*.