Perhaps you should try some spelling variations:
thanh tay » thanh tai, thanh toan, thanh thuy
can thuc » dan thuc, van thuc, cay thuc
va thanh » gia thanh, ban thanh, va tinh
bach ky » bac ky
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
tay cua » day cua, ty cua
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
va can » va chan, va cac, va cao
o hoi » o hoc, o hai, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach ky nang ((o hoi) OR (co hoi)). hieu va can thuc va thanh tay cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu bach ky nang ((o hoi) OR (co hoi)). hieu va can thuc va thanh tay cua tre".
• Adding a wildcard symbol may retrieve word variants: vu bach ky nang ((o hoi) OR (co hoi)). hieu va can thuc va thanh tay cua tre*.