Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
tuc van » thuc van, truc van, tuc va
va cham » va chat, va tham
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cau tren, cau treo

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang xa hoi. lieu va cham tuc van hanh di ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty nang xa hoi. lieu va cham tuc van hanh di ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty nang xa hoi. lieu va cham tuc van hanh di ((cua tre) OR (cuu tre))*.