Perhaps you should try some spelling variations:
chi viet » chi tiet, thi viet, che viet
thanh va » thanh van, hanh va, thanh ha
sach thu » sach thue, sach thieu, sach tham
sach ty » sach y, sach tu, xach tay
hieu ve » hieu va, hieu van
xang xa » lang xa, mang xa, ang xa
tuc va » thuc va, truc va, duc va
va chi » van chi, va che, va cai
ve cam » ve cham, ve cac, va cam

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 ty) OR (sach thu)) xang xa hoi. hieu ve cam ((tuc va) OR (tuc xa)) thanh va chi viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) xang xa hoi. hieu ve cam ((tuc va) or (tuc xa)) thanh va chi viet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) xang xa hoi. hieu ve cam ((tuc va) or (tuc xa)) thanh va chi viet*.