Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
trung va » truong va, trang va, trung ha
sach ky » sac ky, sach y, sach ty
van cau » van dau, van hau, van chat
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, ve cac, le cau
va cau » va cac, va dau, va cao
di cua » dai cua, doi cua, de 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: toc sach ky nang x hoi. hieu ((ve cau) or (((va cau) OR (van cau)))) trung va danh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang x hoi. hieu ((ve cau) OR (((va cau) OR (van cau)))) trung va danh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang x hoi. hieu ((ve cau) or (((va cau) OR (van cau)))) trung va danh di cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu ((ve cau) or (((va cau) OR (van cau)))) trung va danh di cua tre*.