Perhaps you should try some spelling variations:
kinh moi » dinh moi, kinh mon, kinh hoc
hieu van » hieu va, thien van, lieu va
sinh moi » dinh moi, sinh khoi, sinh hoc
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
te sach » toc sach
nam tuc » nam thuc, nam truc, nam tu
cuu tre » cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
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 tuc va ((kinh moi) or (sinh moi)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu van nam tuc va ((kinh moi) OR (sinh moi)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu van nam tuc va ((kinh moi) or (sinh moi)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van nam tuc va ((kinh moi) or (sinh moi)) ((cua tre) OR (cuu tre))*.