Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
te sach » toc sach
dinh ve » dinh ket, dinh van
va dinh » van dinh, va kinh, va tinh
nam xuc » cam xuc, nam xua, nam duoc
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
cuu tre » cua tre, cau tren, cau treo
ve cuu » ve cau, ve chu, ve cua

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 lang) or (ky dang)) xa hoi. hieu van ((nam xuc) or (nam thuc)) va dinh ve cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky dang)) xa hoi. hieu van ((nam xuc) OR (nam thuc)) va dinh ve cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky dang)) xa hoi. hieu van ((nam xuc) or (nam thuc)) va dinh ve cuu tre*.