Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
sach tay » xach tay, sach hay, sach nay
trang xa » trang va, trang ha, trong xa
te sach » toc sach
hanh li » nhanh li, hanh vi, thanh loi
truc va » thuc va, thuc vat, trung va
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tang xa » tang ma, lang xa, tang ha
ca tren » cau tren, cu tren, la tren
han li » shan li, ban li, dan li

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 tay ((tang xa) OR (trang xa)) hoi. hieu va cham truc va ((hanh li) OR (han li)) ca tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tay ((tang xa) OR (trang xa)) hoi. hieu va cham truc va ((hanh li) or (han li)) ca tren~".
• Adding a wildcard symbol may retrieve word variants: te sach tay ((tang xa) OR (trang xa)) hoi. hieu va cham truc va ((hanh li) or (han li)) ca tren*.