Perhaps you should try some spelling variations:
te sach » toc sach
ty dong » tay dong, tu dong, ly dong
ty hang » ly hang, ty xang, thi hang
cay cho » cap cho, cao cho, cay co
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
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 cau » van cau, va cac, va dau
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 dong) or (ty hang)) cay cho. hieu va cau truc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty dong) OR (ty hang)) cay cho. hieu va cau truc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ty dong) or (ty hang)) cay cho. hieu va cau truc va hanh di cua tre*.