Perhaps you should try some spelling variations:
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
nam thuc » nam thuoc, am thuc, nam thu
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
dan vai » dan va, dan tai, dan vat
cua tre » cuu tre, cua triet, dua tren
san ky » sang ky, van ky, dan ky
va nam » van nam, ha nam, va nay
va dan » ca dan, va dao, va dau
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc san ky dang cay phoi. hieu va nam thuc va dan vai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc san ky dang cay phoi. hieu va nam thuc va dan vai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: toc san ky dang cay phoi. hieu va nam thuc va dan vai ((cua tre) OR (cua te))*.