Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu san, tu bac
tu ban » thu ban, te ban
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sac) or (tu cac))) or (tu ban)) ky nang x hoi. hieu va tham thuc va hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sac) OR (tu cac))) OR (tu ban)) ky nang x hoi. hieu va tham thuc va hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sac) or (tu cac))) or (tu ban)) ky nang x hoi. hieu va tham thuc va hanh di cua tre*.