Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh vai » hanh vi, hanh tai, hanh van
thuc van » thuc vat, thuc dan, thuc va
hanh va » hang va, hanh vi
tu cach » tu cac
hieu va » lieu va, hieu qua
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (vu sach)) ky nang x hoi. hieu va nam thuc van ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (vu sach)) ky nang x hoi. hieu va nam thuc van ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (vu sach)) ky nang x hoi. hieu va nam thuc van ((hanh vai) or (hanh va)) cua tre*.