Perhaps you should try some spelling variations:
sach thien » sach thieu, sach tien, cach thien
thien nang » thien bang, thien dang, trien nang
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
va chat » van chat, va phat, cao chat
va cham » va tham
nang xa » nang x, lang xa, nang ma
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thien nang xa hoi. hieu ((va cham) OR (va chat)) xuc va thanh va ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thien nang xa hoi. hieu ((va cham) OR (va chat)) xuc va thanh va ((cua tre) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu sach thien nang xa hoi. hieu ((va cham) OR (va chat)) xuc va thanh va ((cua tre) or (cuu tre))*.