Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
van hanh » van thanh, ban hanh, van anh
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
hanh di » hanh vi, hanh de, hang di
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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 hay) OR (sach y)) nang xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) van hanh di cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach hay) or (sach y)) nang xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) van hanh di cua tu~".
• Adding a wildcard symbol may retrieve word variants: te ((sach hay) or (sach y)) nang xa hoi. hieu ve ((cac xuc) OR (cac nuoc)) van hanh di cua tu*.