Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
toc sac » toc sach, toc san, hoc sach
dan tai » van tai, dan thi, han tai
den vai » den va, den vay, den vi
dan vai » dan va, dan vat, dang van
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay

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