Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
van hanh » van thanh, ban hanh, van anh
cham tuc » pham thuc, tham thuc, cham soc
te sach » toc sach
sach ty » sach y, sach tu, sach thu
hanh di » hanh vi, hanh de, hang di
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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 ty ((nang xa) OR (lang xa)) hoi. hieu va ((cham tuc) OR (nham thuc)) van hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (lang xa)) hoi. hieu va ((cham tuc) OR (nham thuc)) van hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang xa) or (lang xa)) hoi. hieu va ((cham tuc) OR (nham thuc)) van hanh di cua tre*.