Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
nam thuc » nam thuoc, am thuc, nam thu
dan tai » van tai, dan thi, han tai
dan vat » dang vat, van vat, dan dat
toc sai » toc san, toc dai, thuoc sai
lang ha » long ha
hieu va » lieu va, hieu qua
ky lang » ky nang, ky dang, ky tang
cuu tre » cua tre, cau tren, cau treo
va nam » van nam, ha nam, va nay
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi
dan va » doan va, dan ca, ban va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sai ky lang ha hoi. hieu va nam thuc day ((((dan vat) or (dan va))) or (dan tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sai ky lang ha hoi. hieu va nam thuc day ((((dan vat) OR (dan va))) OR (dan tai)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sai ky lang ha hoi. hieu va nam thuc day ((((dan vat) or (dan va))) or (dan tai)) cuu tre*.