Perhaps you should try some spelling variations:
dau tren » dau tien, dat tren, dau tieng
cau tren » cu tren, ca tren, cau treo
hanh dai » hanh tai, hanh dao, vanh dai
sach ty » sach y, sach tu, sach thu
te sach » toc sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
ty hang » ly hang, ty xang, thi hang
hang x » nang x, hoang xa, chang xu
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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: te sach ty hang x hoi. hieu va cac xuc va ((hanh dai) OR (lanh dao)) ((cau tren) OR (dau tren))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty hang x hoi. hieu va cac xuc va ((hanh dai) or (lanh dao)) ((cau tren) OR (dau tren))~".
• Adding a wildcard symbol may retrieve word variants: te sach ty hang x hoi. hieu va cac xuc va ((hanh dai) or (lanh dao)) ((cau tren) OR (dau tren))*.