Perhaps you should try some spelling variations:
te sach » toc sach
ty nang » ky nang, ty hang, ly nang
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
va cao » va co, va dao, va bao
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

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

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