Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
cua duc » cua nuoc, cua quoc
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
sach ly » sach y, sach lo, sach hay
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua tuc » cua tu, cua thuoc, luat tuc

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 ly) OR (sach ty)) nang xa hoi. hieu vien cac xuc van hanh dai ((cua duc) OR (cua tuc))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ly) OR (sach ty)) nang xa hoi. hieu vien cac xuc van hanh dai ((cua duc) or (cua tuc))~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ly) OR (sach ty)) nang xa hoi. hieu vien cac xuc van hanh dai ((cua duc) or (cua tuc))*.