Perhaps you should try some spelling variations:
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
cam tu » cam thu, nam tu, dam tu
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 (ky nang)) xa hoi. ((hieu va) or (lieu va)) cam tu va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) OR (lieu va)) cam tu va hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) cam tu va hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) cam tu va hanh di cua tre*.