Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
nam xuc » cam xuc, nam xua, nam thuc
te sach » toc sach
mat hoi » mai hoi, sat hoi, mat troi
ky danh » ky anh
ky dang » ky nang
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va

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) OR (ky danh)) mat hoi. hieu van nam xuc va hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky dang) OR (ky danh)) mat hoi. hieu van nam xuc va hanh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky dang) OR (ky danh)) mat hoi. hieu van nam xuc va hanh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky dang) OR (ky danh)) mat hoi. hieu van nam xuc va hanh vi ((cua tre) or (cuu tre))*.