Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thac toc » cac toc, thi toc
thac cac » thoai cac, thanh cac, thuc cach
van dinh » van minh, van dich, va dinh
cau treo » cau theo, cau tren, cau triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
dinh vi » dinh ve, dinh viet, dinh tri
vi cau » va cau, ve cau, di cau
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 va ((thac toc) OR (thac cac)) van dinh vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang x hoi. hieu va ((thac toc) OR (thac cac)) van dinh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu va ((thac toc) OR (thac cac)) van dinh vi cau treo*.