Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cau treo » cau theo, cau tren, cau triet
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
thi toc » thi tac, thi goc, thi loc
va dinh » van dinh, va kinh, va tinh
dinh vi » dinh ve, dinh viet, dinh tri
va thi » van thi, vu thi, ha thi
toc va » hoc va, toc ta, tuc va
vi cau » va cau, ve cau, di cau
x hoi » o hoi, x ho, 5 hoi

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) or (xa hoi)). hieu va thi toc va dinh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ((x hoi) OR (xa hoi)). hieu va thi toc va dinh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ((x hoi) or (xa hoi)). hieu va thi toc va dinh vi cau treo*.