Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
cham xuc » cam xuc, chat xuc, cham soc
cau tren » dau tren, ca tren, cau treo
dinh tai » dinh toai, dinh tri, dinh thi
dang xay » dang van, van xay
van dinh » van minh, van dich, va dinh
xuc van » duc van, luc van, vuc van
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, lang van
cu tren » tu tren, dua tren

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: doc sach y ((lang xa) OR (dang xay)) hoi. hieu vu cham xuc van dinh tai ((cau tren) OR (cu tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach y ((lang xa) OR (dang xay)) hoi. hieu vu cham xuc van dinh tai ((cau tren) or (cu tren))~".
• Adding a wildcard symbol may retrieve word variants: doc sach y ((lang xa) OR (dang xay)) hoi. hieu vu cham xuc van dinh tai ((cau tren) or (cu tren))*.