Perhaps you should try some spelling variations:
sach tham » sach nha
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
bang va » hang va, ban va, trang va
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
xuc van » duc van, luc van, vuc van
bang xa » lang xa, mang xa, ang xa
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tham ((bang xa) or (bang va)) hoi. hieu va chat xuc van hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tham ((bang xa) OR (bang va)) hoi. hieu va chat xuc van hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach tham ((bang xa) or (bang va)) hoi. hieu va chat xuc van hanh ve cua tre*.