Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
sinh moi » dinh moi, sinh khoi, sinh hoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va sinh » va kinh, va tinh, vi sinh
moi cua » hoi cua, doi cua, moi quan
cua tre » cua te, cuu tre, cua triet
cam tu » cam thu, nam tu, dam tu
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: te sach ky nang x hoi. hieu van ((nam thuc) or (cam tu)) va sinh moi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu van ((nam thuc) OR (cam tu)) va sinh moi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van ((nam thuc) or (cam tu)) va sinh moi cua tre*.