Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su sach » vu sach
so sach » so sanh, bo sach, co sach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
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: ((su sach) or (so sach)) ky dang xay hoi. hieu va cac duc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky dang xay hoi. hieu va cac duc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky dang xay hoi. hieu va cac duc va hanh di cua tre*.