Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
nang xay » dang xay, nganh xay, nang xuan
vai cua » dai cua, hai cua, lai cua
toc sac » toc sach, hoc sach, doc sach
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sac) or (toc san)) ky nang xay hoi. hieu va nam thuc ((va dan) or (ca dan)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sac) OR (toc san)) ky nang xay hoi. hieu va nam thuc ((va dan) OR (ca dan)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sac) or (toc san)) ky nang xay hoi. hieu va nam thuc ((va dan) or (ca dan)) vai cua tre*.