Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cham tuc » nham thuc, pham thuc, tham thuc
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
nang xa » lang xa, nang ma, mang xa
tuc va » thuc va, truc va, tuc xa
vi cuu » vi luu, vinh cuu

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) or (toc sach)) ky ((nang xa) or (nang x)) hoi. hieu ve cham tuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (toc sach)) ky ((nang xa) OR (nang x)) hoi. hieu ve cham tuc va hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (toc sach)) ky ((nang xa) or (nang x)) hoi. hieu ve cham tuc va hanh vi cuu tre*.