Perhaps you should try some spelling variations:
dang mat » dang vat, dang mau, dung mat
hanh vai » hanh vi, hanh tai, hanh van
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
van cam » van nam, van lam, van cau
mat hoa » ma hoa, mai hoa, chat hoa
ky dang » ky nang, ky danh
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang mat hoa. hieu van cam ((tuc va) or (thuc day)) ((hanh vai) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang mat hoa. hieu van cam ((tuc va) OR (thuc day)) ((hanh vai) OR (hanh va)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky dang mat hoa. hieu van cam ((tuc va) or (thuc day)) ((hanh vai) or (hanh va)) cua tre*.