Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
cau tren » dau tren, ca tren, cau treo
nay thuc » nam thuc, cay thuc, day thuc
day dan » day danh, dao dan, cay dan
cu tren » tu tren, dua tren
dan vai » dan va, dan tai, dan vat
toc sac » toc sach, toc san, hoc sach
hieu va » lieu va, hieu qua
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va nay » va ngay, va cay

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 ky tang xa hoi. hieu va nay thuc day dan vai ((((cau tren) or (cu tren))) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky tang xa hoi. hieu va nay thuc day dan vai ((((cau tren) OR (cu tren))) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: toc sac ky tang xa hoi. hieu va nay thuc day dan vai ((((cau tren) or (cu tren))) or (cua tre))*.