Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
sach nay » sach hay, sach vay, sach nang
nay tang » nam tang, tay tang, anai tang
nhanh li » nhanh vi, thanh loi, nhanh thi
te sach » toc sach
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
hanh li » hanh vi, han li, thanh loi
la tren » loai tren, dua tren, dat tren

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach nay tang xa hoi. hieu va cham truc va ((hanh li) or (nhanh li)) la tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach nay tang xa hoi. hieu va cham truc va ((hanh li) OR (nhanh li)) la tren.
• Adding a wildcard symbol may retrieve word variants: te sach nay tang xa hoi. hieu va cham truc va ((hanh li) or (nhanh li)) la tren*.