Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
va dinh » van dinh, va kinh, va tinh
nam xuc » cam xuc, nam xua, nam thuc
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
xuc va » duc va, tuc va, luc va
va cuu » va cau, va huu
va chu » va che, va cau, va chi

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