Perhaps you should try some spelling variations:
sach tien » sach tren, sach thieu
tien nang » thien nang, trien nang, tin nang
cau tren » cu tren, dau tren, ca tren
hieu van » hieu va, thien van, lieu va
cuu tre » cau treo
cua tre » cua te, cua triet, dua tren
danh vi » hanh vi, dinh vi, danh di
su sach » so sach, vu sach
nam xuc » cam xuc, nam xua, nam thuc
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, va hanh
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: su sach tien nang xa hoi. hieu van nam xuc va danh vi ((cua tre) or (((cuu tre) or (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tien nang xa hoi. hieu van nam xuc va danh vi ((cua tre) OR (((cuu tre) OR (cau tren)))).
• Adding a wildcard symbol may retrieve word variants: su sach tien nang xa hoi. hieu van nam xuc va danh vi ((cua tre) or (((cuu tre) or (cau tren))))*.