Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
cham tuc » nham thuc, pham thuc, tham thuc
vu sach » vu bach, su sach, vu khach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach thu ((nang xa) or (lang xa)) hoi. hieu ve cham tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thu ((nang xa) OR (lang xa)) hoi. hieu ve cham tuc va hanh vi cua tre*.